The primary source of energy for ecosystem processes is photosynthesis. Directly or indirectly, photosynthesis provides the energy for all forms of life in the biosphere.
Answer:
Lake Chad has shrunk by 90% since the 1960s, due to climate change (desertification is turning the land to desert and is causing droughts so it gets hotter and more dry), an increase in the population and unplanned irrigation.
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Explanation:
Farmers may lose money if a drought destroys their crops. If a farmer's water supply is too low, the farmer may have to spend more money on irrigation or to drill new wells. Ranchers may have to spend more money on feed and water for their animals.
Answer:
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Explanation:
Permian-Triassic extinction
