Where did greenhouse gases come from?

Answer

from cars factories sheep cows trash fires, etc. the most common greenhouse gas is carbondioxide (CO2) whereas the most damaging is methane.

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Catalog the greenhouse gases?  Why are greenhouse gases a problem?  Were do the greenhouse gases come from?  What are the causes of greenhouse gases?  What are the causes for greenhouse gases?  What are the names of the greenhouse gases?  What is the main source of increasing greenhouse gases?  Which country is the largest producer of greenhouse gases?  What solutions are already in place to restrict the emission of greenhouse gases?