Lisa Alexander (earth scientist)

"Climate models are one of many tools scientists use to understand how the climate changed in the past and what it will do in future."

"Before industrial times, CO₂ levels in the atmosphere were 280 parts per million. So a doubling of CO₂ will occur at 560 parts per million."

"So should we be using climate models? We are climate scientists from Australia’s Centre of Excellence for Climate Extremes, and we believe the answer is a firm yes."

""Emissions resulting from human activities are substantially increasing the concentrations of carbon dioxide [and other greenhouse gases. These increases will enhance the greenhouse effect, resulting on average in an additional warming of the Earth’s surface.'"

"When we say there’s a scientific consensus that human-produced greenhouse gases are causing climate change, what does that mean? What is the Intergovernmental Panel on Climate Change and what do they do?"