"Each year—as a result of , automobiles, , , and tropical —humankind spews some 8 billion tons of , , and other carbon-based pollutants into the atmosphere. The net effect, as we all know, has been an alarming rise in air pollutants—particularly carbon dioxide, which has increased by more than a third, from 280 to 380 parts per million (ppm), since the onset of the industrial era. Equally distressing is that these emissions are accelerating, because countries like the United States have failed to rein their burgeoning emissions and because rapidly developing countries like China, India, and Brazil are increasingly adopting the energy-consumptive lifestyles of industrial nations. From 1800 to 1960, for example, the average annual increase in atmospheric carbon dioxide concentrations was just 0.2 ppm, but this jumped to 1.4 ppm from 1960 to 2000 and has since risen to 2.3 ppm."