The document discusses various topics related to climate change including:
1. Different biomes and their typical climates such as tundra, taiga, temperate grasslands, and tropical rainforests.
2. Causes of climate change like the greenhouse effect, El Nino, and greenhouse gases such as carbon dioxide, methane, and nitrous oxide.
3. Impacts of climate change like rising sea levels, more frequent extreme weather events, threats to agriculture and water supplies, and effects on plants and animals.
4. Examples of climate change impacts through case studies on drought in Australia and Hurricane Katrina in New Orleans.
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