Some greenhouse gases, such as fluorocarbons (CFCs, HFCs, PFCs, etc.), are human-made. Others, such as water, methane, and carbon dioxide, are naturally produced. Which type of greenhouse gas (human-made or natural) is more difficult to control and eliminate? Which types are easier? In three to five sentences, provide evidence for your argument.

Answer 1

Here is a good overview by EPA. There is a lot of useful information here although I don't know that it will answer all of your questions.
h ttps://www.epa.gov/ghgemissions/overview-greenhouse-gases