Since the industrial revolution, man has burned ever larger quantities of fossil , first coal and then oil, with the that the composition of the atmosphere has started to change. Burning these produces gasses such as carbon dioxide, which act in the atmosphere like glass in a greenhouse and trap the of the sun - this is known as the greenhouse . The overall global temperature has already begun to rise. Global is expected to to extreme change climate, with more frequent floods, droughts and waves. person, animal, bug or bird will be unaffected.