sustainability

""Honey equals income, equals jobs, equals gender equality, equals conservation.”"

"Nature remains our greatest ally to reach our climate mitigation targets. Planting trees is essential, but we need to raise a forest generation that will thrive and live in harmony with nature."

"We can't fight the climate emergency if we cannot protect and regenerate our land."

"My community of 300,000 people depends on nature for livelihood. We find daily solutions in our forest and in our farmlands. But our natural resources face a lot of challenges deforestation, over-exploitation, encroachment and poor soil conservation. And these are made worse by gender inequality, cultural barriers and little or no knowledge about the goodness of nature."

"The medium of energy transport from an atomic reactor to sites at which energy is required should not be electricity, but hydrogen. The term "hydrogen economy" applies to the energetic, ecological, and economic aspects of this concept. The concept envisages reactors held on platforms floating on water. They are in water sufficiently deep to make heat dissipation easy/ The electricity they make would be converted on site to hydrogen and oxygen by hydrolysis. The hydrogen would be piped to distribution stations and thereafter sent to factory and home. Reconversion to electricity would take place in on-site fuel cells, the only side product ebing pure water."

"One alternative to fossil fuels is ‘green’ hydrogen, which can be produced through water electrolysis by using an electric current to split water into hydrogen and oxygen with no greenhouse gas emissions, provided the electricity used to power the process is entirely from renewables. Hydrogen’s high mass energy density, light weight, and facile electrochemical conversion allow it to carry energy across geographical regions through pipelines or in the form of liquid fuels like ammonia on freight ships ... Across sectors as it can be used as a chemical feedstock, burned for heat, used as a reagent for synthetic fuel production, or converted back to electricity through fuel cells. Furthermore, hydrogen’s long-term energy storage capacity in tanks or underground caverns ... makes it one of the only green technologies that can store energy across seasons."

"There are three different primary energy-supply system classes which may be used to implement the hydrogen economy, namely, fossil fuels (coal, petroleum, natural gas, and as yet largely unused supplies such as shale oil, oil from tar sands, natural gas from geo-pressured locations, etc.), nuclear reactors including fission reactors and breeders or fusion nuclear reactors over the very long term, and renewable energy sources (including hydroelectric power systems, wind-energy systems, ocean thermal energy conversion systems, geothermal resources, and a host of direct solar energy-conversion systems including biomass production, photovoltaic energy conversion, solar thermal systems, etc.). Examination of present costs of hydrogen production by any of these means shows that the hydrogen economy favored by people searching for a non-polluting gaseous or liquid energy carrier will not be developed without new discoveries or innovations. Hydrogen may become an important market entry in a world with most of the electricity generated in nuclear fission or breeder reactors when high-temperature waste heat is used to dissociate water in chemical cycles or new inventions and innovations lead to low-cost hydrogen production by applying as yet uneconomical renewable solar techniques that are suitable for large-scale production such as direct water photolysis with suitably tailored band gaps on semiconductors or low-cost electricity supplies generated on ocean-based platforms using temperature differences in the tropical seas."

"Already in 1874, Jules Verne in his novel The Mysterious Island, lets the engineer Cyrus Harding reply when asked what mankind will burn instead of coal, once it has been depleted: water decomposed into its primitive elements. ... and decomposed doubtless, by electricity ... Yes, my friends, I believe that water will one day be employed as fuel, that hydrogen and oxygen which constitute it, used singly or together, will furnish an inexhaustible source of heat and light, of an intensity of which coal is not capable. Today's energy and transport system, which is based mainly on fossil fuels, can in no way be evaluated as sustainable. In the light of the projected increase of global energy demand, concerns over energy supply security, climate change, local air pollution and increasing prices of energy services are having a growing impact on policy making throughout the world. At present, oil, with a share of more than one third in the global primary energy mix, is still the largest primary fuel and covers more than 95% of the energy demand in the transport sector."

"Although in many ways hydrogen is an attractive replacement for fossil fuels, it does not occur in nature as the fuel H2. Rather, it occurs in chemical compounds like water or hydrocarbons that must be chemically transformed to yield H2. Hydrogen, like electricity, is a carrier of energy, and like electricity, it must be produced from a natural resource. At present, most of the world’s hydrogen is produced from natural gas by a process called steam reforming. However, producing hydrogen from fossil fuels would rob the hydrogen economy of much of its raison d’être: Steam reforming does not reduce the use of fossil fuels but rather shifts them from end use to an earlier production step; and it still releases carbon to the environment in the form of CO2. Thus, to achieve the benefits of the hydrogen economy, we must ultimately produce hydrogen from non-fossil resources, such as water, using a renewable energy source."

"While industry players have already started the market introduction of hydrogen fuel cell systems, including fuel cell electric vehicles and micro-combined heat and power devices, the use of hydrogen at grid scale requires the challenges of clean hydrogen production, bulk storage and distribution to be resolved. Ultimately, greater government support, in partnership with industry and academia, is still needed to realize hydrogen's potential across all economic sectors."

"Unlike CH4 and CO2, ammonia is not a greenhouse gas. In the atmosphere, it quickly forms hydrogen bonds to water vapor and returns to the ground in alkaline rain. However, NH3 is toxic, chills its surroundings rapidly on vaporizing, and releases heat on contact with water. Engineering a safe fuel tank for an ammonia-fueled vehicle would be a key priority. Ammonia is an excellent material for hydrogen storage. ... the volume density of hydrogen in liquid NH3 is more than 40% greater than in liquid H2, and the comparison becomes much more favorable when one considers the weight of the required fuel tank and peripherals. Unlike H2 gas, ammonia explodes in air only over a narrow range of concentrations. Shipping ammonia from production site to point-of-use does not require a great deal of cooling or high pressure. Thousands of miles of NH3 pipeline in the US stand as evidence that reliable infrastructure for NH3 transport and storage has been engineered. In sum, liquid NH3 is not just an excellent hydrogen-storage material but also an ideal medium for moving hydrogenic energy from place to place."

"With agriculture . . . each year’s emissions of methane and nitrous oxide are the equivalent of more than 7 billion tons of carbon dioxide."

"{W}ith transportation, the zero-carbon future is basically this: Use electricity to run all the vehicles we can, and get cheap alternative fuels for the rest. In the first group are passenger cars and trucks, light and medium trucks, and buses. In the second group are long-distance trucks, trains, airplanes, and container ships."

"The most effective tree-related strategy for climate change is to stop cutting down so many of the trees we already have."

"[W]e don’t have a practical way to make [the cement in concrete] without producing carbon."

"[W]e’re going to need much more clean electricity in the coming years. . . . [B]y 2050 . . . the world will need much more than three times the electricity we generate now."

"[C]ement . . . steel [and] plastics are cheap because fossil fuels are cheap."

"The path to zero carbon for heating actually looks a lot like the path for passenger cars: (1) electrify what we can, getting rid of natural gas water heaters and furnaces, and (2) develop clean fuels to do everything else."

"There are two numbers you need to know about climate change. The first is 51 billion. The other is zero. Fifty-one billion is how many tons of greenhouse gases the world typically adds to the atmosphere every year. . . . Zero is what we need to aim for [by the year 2050 to] stop the warming and avoid the worst effects of climate change . . . ."

"Few climate crisis books give cause for hope. But Bill Gates’s new title does just that as [he] charts a way for private enterprises and governments to stave off the worst of global warming. . . . [He] is convinced that fossil fuels have to be replaced with renewable energy – and as soon as possible. Factories, vehicles and heating systems must all become electrified, and then run on green power. . . . So far, so good! [He also] says nuclear plants will stabilise the smart grids that link our energy systems of the future. . . . Here, however, he’s wrong. . . . [H]e underestimates the expert opinion that better storage – batteries and beyond – together with demand management and smart networks can balance the grid. One cornerstone to this way forward: natural gas would have to be on standby. But why not? This is already the case in Germany. . . . The other bone I have to pick with Gates lies in his contention that our market economies and extravagant lifestyles don’t have to change. . . . [C]riticism aside, this readable and jargon-free book offers valuable nuggets and advice for investors and politicos."

"Bill Gates [in his] new book, "How to Avoid a Climate Disaster" [asserts that if] humanity is to win the great race between development and degradation . . . green innovation must accelerate. . . . [G]iven the pressing need to decarbonise the global economy, says Mr Gates, "we have to force an unnaturally speedy transition" [to carbon-free energy, and the] linchpin of his argument is the introduction of a meaningful carbon price to account for the externalities involved in using dirty energy. . . . [Some will consider Gates' views on several issues to be] an outmoded mindset. He is an unabashed defender of carbon-free nuclear power, despite the industry's failure to solve serious problems surrounding waste and proliferation. He chastises those who make a fetish out of wind and solar technologies, emphasising the constraints of the intermittent generation they involve. . . . Mr Gates . . . acknowledges the power of the state and a need for intergovernmental co-operation, something not often heard from techno-libertarians; but he also calls for more green ambition and risk-taking by short-termist investors and company bosses. Ultimately his book is a primer on how to reorganise the global economy so that innovation focuses on the world’s gravest problems. It is a powerful reminder that if mankind is to get serious about tackling them, it must do more to harness the one natural resource available in infinite quantity — human ingenuity."

"Some companies may go under in the coming years; that comes with the territory when you’re doing cutting-edge work . . . ."

"[Question] 3: How Much Power Are We Talking About? . . . [A] watt is a bit of energy per second [like] measuring the flow of water out of your kitchen faucet . . . . Watts are equivalent to "cups per second." A watt is pretty small. A small incandescent bulb might use 40 of them. A hair dryer uses 1,500. A power plant might generate hundreds of millions of watts. . . . Because these numbers get big fast, it's convenient to use some shorthand. A kilowatt is 1,000 watts, a megawatt is a million, and a gigawatt . . . is a billion."

"[Question] 5: How Much Is This Going to Cost? . . . Most . . . zero-carbon solutions are more expensive than their fossil-fuel counterparts. . . . These additional costs are what I call Green Premiums. . . . Green Premiums [can help us] decide which zero-carbon solutions we should deploy now [those with low or negative premiums] and where we should pursue breakthroughs because the clean alternatives aren't cheap enough."

"Deploying today’s renewables and improving transmission couldn’t be more important. . . . Unless we use large amounts of nuclear energy . . . every path to zero in the United States will require us to install as much wind and solar power as we can build and find room for. . . . [[w:Renewable energy in the United States#Potential resources|[M]ost countries aren’t as lucky as the United States when it comes to solar and wind resources]]. . . . That’s why, even as we deploy, deploy, deploy solar and wind, the world is going to need some new clean electricity inventions too."

"Offshore wind holds a lot of promise . . . ."

"[In discussing solely cement, steel and plastics in this chapter] I'm leaving out fertilizer, glass, paper, aluminum, and many others. . . . We manufacture enormous amounts of materials, resulting in copious amounts of greenhouse gases, nearly a third of the 51 billion tons per year."

"[T]he path to zero emissions in manufacturing looks like this: (1) Electrify every process possible. This is going to take a lot of innovation. (2) Get that electricity from a power grid that’s been decarbonized. This also will take a lot of innovation. (3) Use carbon capture to absorb the remaining emissions. And so will this. (4) Use materials more efficiently. Same."

"There’s so much animal poop that it’s actually the second-biggest cause of emissions in agriculture, behind enteric fermentation."

"[W]orldwide, crops take up less than half the nitrogen applied to farm fields. The rest runs off into ground or surface waters, causing pollution, or escapes into the air in the form of nitrous oxide . . . ."

"As an Employee or Employer . . . Prioritize innovation in low-carbon solutions. . . . Be an early adopter. . . . Connect with government-funded research."

"[How to Avoid a Climate Disaster] could not be more timely . . . . [W]e are in dire need of solutions to the greatest crisis our species has yet faced. . . . It is a disappointment, then, to report that this book turns out to be a little underwhelming. . . . [The [[w:Swanson's law|price of] solar power has dropped astonishingly in the last decade]] [and] storage batteries are now dropping in price on a similar curve . . . . [Bill Gates is] absolutely right that we should be investing in research across a wide list of technologies because we may need them down the line to help scrub the last increments of fossil fuel from the system, but the key work will be done (or not) over the next decade, and it will be done by sun and wind. . . . Most people, Gates included, have not caught on yet to just [[w:Cost of electricity by source|how fast [the price decline for solar and wind power] is happening]]. So why aren’t we moving much faster than we are? That’s because of politics, and this is where Gates really wears blinders. "I think more like an engineer than a political scientist," he says proudly — but that means he can write an entire book about the "climate disaster" without discussing the role that the fossil fuel industry played, and continues to play, in preventing action. . . . Power comes in many forms, from geothermal and nuclear to congressional and economic; it’s wonderful that Gates has decided to work hard on climate questions, but to be truly helpful he needs to resolve to be a better geek — he needs to really get down on his hands and knees and examine how that power works in all its messiness. Politics very much included."

"In his new book, How to Avoid a Climate Disaster, Bill Gates takes a technology-centered approach to understanding the climate crisis. . . . [I]n 2015, Gates and several dozen other wealthy people launched Breakthrough Energy, an interlinked venture capital fund, lobbying group, and research effort [that invests] in energy innovation. . . . A parallel effort, an international pact called Mission Innovation [persuades governments to fund] clean-energy research and development. These various endeavors are the through line for [the] book . . . As many others have pointed out, a lot of the necessary technology already exists; much can be done now. Though Gates doesn’t dispute this, his book focuses on the technological challenges that he believes must still be overcome to achieve greater decarbonization. He spends less time on the political obstacles . . . . Yet politics, in all its messiness, is the key barrier to progress on climate change."

"Technologies needed [to help avoid a climate disaster]: Hydrogen produced without emitting carbon Grid-scale electricity storage that can last a full season Electrofuels Advanced biofuels Zero-carbon cement Zero-carbon steel Plant- and cell-based meat and dairy Zero-carbon fertilizer Next-generation nuclear fission Nuclear fusion Carbon capture (both direct air capture and point capture) Underground electricity transmission Zero-carbon plastics Geothermal energy Pumped hydro Thermal storage Drought- and flood-tolerant food crops Zero-carbon alternatives to palm oil [and] Coolants that don’t contain F-gases."

"It helps to set ambitious goals and commit to meeting them, the way countries around the world did with the 2015 Paris Agreement. It’s easy to mock international agreements, but they’re part of how progress happens: If you like having an ozone layer, you can thank an international agreement called the Montreal Protocol."

"There are various ways, including a carbon tax or cap-and-trade program, to ensure that at least some of [the] external costs {associated with greenhouse gas emissions} are paid by whoever is responsible for them. . . . The idea isn't to punish people for their greenhouse gases; it's to create an incentive for inventors to create competitive carbon-free alternatives. By progressively increasing the price of carbon to reflect its true cost, governments can nudge producers and consumers toward more efficient decisions and encourage innovation . . . ."

"By the middle of this century, the cost of climate change to all coastal cities could exceed $1 trillion . . . each year."

"To get these [breakthroughs on the "Technologies needed" list] ready soon enough to make a difference, governments need to . . . [q]uintuple clean energy and climate-related R&D over the next decade. . . ."

"[I]f you want a measuring stick for which countries are making progress on climate change . . . don't simply look for the ones that are reducing their emissions. Look for the ones that are setting themselves up to get to zero."

"We need to accomplish something gigantic we have never done before, much faster than we have ever done anything similar. To do it, we need lots of breakthroughs in science and engineering. We need to build a consensus that doesn’t exist and create public policies to push a transition that would not happen otherwise. . . . But don’t despair. We can do this."

"Gates is right about the scale and urgency of the problem . . . . [He has a] touching, admirable faith in science and reason, [but he also] knows that the solution he seeks is inextricably tied up in political decisions. . . . [T]o operationalise the [[w:Paris Agreement|Paris [COP21] agreement]] – to limit warming to 1.5 degrees – requires countries to halve their CO2 emissions by 2030. So vested interests like big oil will have to be enlisted for change. The . . . rhetoric of irresponsible demagogues will have to be taken head on. And supporters of a stronger set of commitments will have to show why sharing sovereignty is in every nation’s self-interest . . . . Success will come by demonstrating that the real power countries can wield to create a better world is not the power they can exercise over others but the power they can exercise with others."

"We should spend the next decade focusing on the technologies, [governmental] policies and market structures that will put us on the path to eliminating greenhouse gases by 2050. It's hard to think of a better response to a miserable [year of COVID-19 disruptions during] 2020 than spending the next ten years dedicating ourselves to this ambitious goal."

"There are markets worth billions of dollars waiting for someone to invent low-cost, zero-carbon cement or steel, or a net-zero liquid fuel. As I’ve tried to show, making these breakthroughs and getting them to scale will be hard, but the opportunities are so big that it’s worth getting out in front of the rest of the world."

"The reason we need to get to zero is simple. Greenhouse gases trap heat, causing the average surface temperature of the earth to go up. . . . Once greenhouse gases are in the atmosphere, they stay there for a very long time . . . . There’s no scenario in which we keep adding carbon to the atmosphere and the world stops getting hotter, and the hotter it gets, the harder it will be for humans to survive, much less thrive."

"I [have become] convinced of three things: 1. To avoid a climate disaster, we have to get to zero {net emissions by the year 2050}. 2. We need to deploy the tools we already have, like solar and wind, faster and smarter. 3. And we need to create and roll out breakthrough technologies that can take us the rest of the way."

"When it comes to climate change, I know innovation isn’t the only thing we need. But we cannot keep the earth livable without it. Techno-fixes are not sufficient, but they are necessary."

"[Question] 2. What’s Your Plan for Cement? . . . [This question] is just a shorthand reminder that if you're trying to come up with a comprehensive plan for climate change, you have to account for much more than electricity and cars."

"Pages 54 and 55"

"Pages 56 and 57"

"Just about everyone who’s alive now will have to adapt to a warmer world. As sea levels and floodplains change, we’ll need to rethink where we put homes and businesses. We’ll need to shore up power grids, seaports, and bridges. We’ll need to plant more mangrove forests . . . and improve our early-warning systems for storms."