Carbon, sulfur, phosphorus, and nitrogen cycles are processes through which these elements cycle through the Earth's atmosphere, hydrosphere, lithosphere, and biosphere. Human activities, such as burning fossil fuels and agriculture, can disrupt these cycles through activities like deforestation, industrial pollution, and fertilizer use.
Eutrophication is caused by an excess of nutrients, particularly nitrogen and phosphorus, in aquatic ecosystems. This leads to excessive algae growth, oxygen depletion, and ecosystem degradation
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