James Hansen (Climatologist)

James Hansen is a prominent American climatologist known for his early and influential work on climate change. He was the director of NASA's Goddard Institute for Space Studies for over three decades and is renowned for his research on global warming and its potential impacts. Hansen famously testified before Congress in 1988, raising awareness about climate change and advocating for urgent action. He emphasizes the importance of reducing greenhouse gas emissions to mitigate climate risks. His advocacy has made him a key figure in public discourse on environmental issues and climate policy.