I always thought global warming is over taught in Gcses science like there is political agenda behind it. I don't know if any one else agrees. Somehow at the time I thought I understood the science behind it very well later I realised I know nothing about it and its highly publicised area. I know there are sceptics. I am not one or qualified to be one I simply do not understand the science behind it well. I know there is a chapter dedicated to global warming ( I could be wrong a friend told me this), but I didn't take As chemistry. How does the rise of co2 emission and other green house gasses trap radiations? How does earth atmosphere protects the earth from high energy electromagnetic radiations yet allows the low energies like infra-red in. My understanding of waves tells me it should the other way around because the higher the frequency the smaller wavelength the easier it is for it penetrate through.