�ݺ�ߣ

The document summarizes the causes and effects of global warming. It discusses how global warming is caused by factors like deforestation, pollution from industries and cars, and desertification. It then examines how global warming impacts cities through higher temperatures, heat islands and rising sea levels. Global warming also affects crops via issues with food and water availability, as well as temperature changes leading to problems like drought. Animal life and health are impacted through effects on temperatures, glaciers, marine ecosystems and disease. Potential solutions proposed include use of renewable energy, clean transportation, and policies to reduce carbon emissions.