Question

How have humans changed the atmosphere of the planet in the past 200 years?

Answer 1

Primarily by increasing the amount of carbon dioxide in the atmosphere by burning carbonaceous materials for energy.

Step-by-step explanation:

They have also affected parts of the atmosphere by introducing Chloro-fluorocarbons which affect the protective ozone layer and other “Greenhouse gases” that may warm the atmospheric temperature by adsorption of solar energy.

Answer 2

we have contributed to greenhouse gases and added carbon dioxide.

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