James E. Hansen

James E. Hansen is a renowned American climate scientist who has made significant contributions to understanding Earth's climate change. As a former NASA scientist, he was one of the first to warn about the dangers of global warming caused by greenhouse gases, especially carbon dioxide. Hansen's research emphasizes that human activities are rapidly increasing Earth's temperature, leading to climate impacts like rising sea levels and extreme weather. He advocates for policies to reduce emissions and emphasizes the urgency of addressing climate change to protect future generations. His work has played a crucial role in raising public awareness and scientific understanding of global warming.