This document discusses various types of man-made environmental disasters including nuclear disasters, biological disasters, chemical disasters, terrorism, and global warming. It provides details on several notable past events for each disaster type, such as the nuclear disasters at Hiroshima, Nagasaki, Chernobyl, and Fukushima, the Bhopal chemical disaster, and terrorist attacks like 9/11. The document also discusses the causes of global warming, with 90% attributed to human activities like burning fossil fuels and deforestation. Finally, it lists the top 10 cleanest countries based on environmental performance metrics.