The document discusses global and local environmental problems. Three global issues covered are global warming, water pollution, and air pollution. Global warming is primarily caused by too much carbon dioxide in the atmosphere from burning fossil fuels and deforestation. Water pollution stems from industrial waste, sewage, mining, marine dumping, and oil leaks. Air pollution sources include power plants, vehicle emissions, industry, deforestation, wood fires, smoking, and natural processes. The document also briefly mentions local waste disposal issues.
