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How have humans changed the atmosphere?

In: Earth Sciences [Edit categories]

Answer:

cutting down trees

were using up gas

First answer by Billkaulitzluver89. Last edit by Billkaulitzluver89. Contributor trust: 1 [recommend contributor ]. Question popularity: 1 [recommend question].

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How have humans changed the atmosphere of the planet in the past 200 years?
They have increased the levels of greenhouse gases.
How have humans changed the earths atmosphere?
Humans are making earth much warmer so its changing.
How have humans changed?
humans have changed because they used to be hobbits which are half human half hobbit
How has human changed it?
idk LOZERZ
Why has the atmosphere changed?
The atmosphere has changed over time because of the use of chlorofluorocarbons (CFC's) as well as bacterial oxidation changing NH3 into N2 and photosynthesis which made O2 more abundant than CO2.