This document discusses atmospheric pollution and global warming. It defines key terms like global warming, climate change, and the greenhouse effect. It explains that the burning of fossil fuels is the primary human activity causing increased carbon dioxide and greenhouse gas emissions, which is leading to changes in climate and rising global temperatures. Some effects of global warming discussed include increased extreme weather, rising sea levels, ocean acidification, and impacts on plants and animals. The document also outlines social impacts such as reduced food security, health impacts, and potential for conflict.