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Greenhouse gases are responsible for the Greenhouse Effect But before we investigate that, let's find out what greenhouse gases are Can you name any of them? Methane is the next of the greenhouse gases which has the biggest effect on global warming (15%) This is generated by activities such as livestock production, agriculture, sewage treatment, natural gas and oil distribution , coal mining,The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere Radiatively active gases (ie, greenhouse gases) in a planet's atmosphere radiate energy in all directionsPart of this radiation is directed towards the surface, thus warming it Igcse Biology 17 4 15 Understand How An Increase In Greenhouse Gases Results In An Enhanced Greenhouse Effect And That This May Lead To Global Warming And Its Consequences Increase in greenhouse gases effect