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 However, beginning in the late 1700s, the net global effect of human activities has been a continual increase in greenhouse gas concentrations This change in concentrations causes warming and is affecting various aspects of climate, including surface air and ocean temperatures, precipitation, and sea levelsGreenhouse effect, a warming of Earth 's surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air Of those gases, known as greenhouse gases, water vapour has the largest effect In computerbased models, rising concentrations of greenhouse gases produce an increase in the average surface temperature of the earth over time Rising temperatures may produce changes in precipitation patterns, storm severity, and sea level Collectively, this is commonly referred to as climate change Greenhouse Gases Tips To Reduce Your Greenhouse Gases Delmarfans Com Greenhouse gases effect ...