I know the first one deals with wetlands. It was just an example of the idea of a feedback loop. When you destroy carbon sinks, it tends to release it, which cause eventually more problems. The same concept follows when you get enough melting of ice. It releases more greenhouse gases. Desertification also increases global temperatures and CO2 concentrations. Humans cause that too.

It's not as serious yet. I will try to find the article about CO2 feedback loops they are predicting will make the problem worse.

Most of the greenhouse gases are natural. But imo, that doesn't make human one's insignificant.

THe CO2 feedback loop is supposed to become much more of a problem later.

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