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 are trapping heat in the atmosphere and leading to increased global temperatures. Some effects of global warming discussed include rising sea levels, more extreme weather, melting ice caps and glaciers, and harm to plants and animals. The document also outlines serious social impacts that could result like problems with agriculture, food security, and increased health issues.