Life depends on the warmth of the sun being trapped by a layer of gases that surround the Earth. We now produce so much of these heat trapping gases that the layer is getting thicker, heating the world, changing our climate and threatening our way of life. As the world gets hotter, the climate will change and some of the extreme effects we have witnessed will become more frequent; making our planet a more hostile place to live. If we could see the gases, the causes of the problem would be obvious to everyon