How do fossil fuels affect the carbon cycle?

When humans burn fossil fuels, most of the carbon quickly enters the atmosphere as carbon dioxide. Carbon dioxide is a greenhouse gas and traps heat in the atmosphere. Without it and other greenhouse gases, Earth would be a frozen world.

Explanation:

When humans burn fossil fuels, most of the carbon quickly enters the atmosphere as carbon dioxide. ... Carbon dioxide is a greenhouse gas and traps heat in the atmosphere. Without it and other greenhouse gases, Earth would be a frozen world.

The burning of fossil fuels from various industrial processes adds nitrogen and nitrous oxide compounds to the atmosphere, which upsets the balance of natural nitrogen, polluting ecosystems and altering the ecology of entire regions. ... This upset in the balance of the nitrogen cycle affects biological diversity.

Explanation:

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