...; A few words on the climate change: Climate change and global warming are hot topics nowadays especially for politicians' advertisement that want to say they are very kind to mankind! But there is a lot of hypocrisy going on; for example, they have focused on CO2 and there is a lot of research and investment to minimize carbon dioxide emission. The most popular trend in new generation of cars, instead of electric cars, is moving towards replacement of the fossil fuel cars with those that emit water vapor. However, they do not tell people that the worst topmost greenhouse gas which also contributes in atmosphere warming is water vapor itself which hits carbon dioxide and any other gas significantly. Maybe reduction of carbon dioxide result in a decrease in acidic rains or acidification of the oceans, but if there is any problem called global warming, which is doubted to be real or not, they must invest in electric motors rather than vapor emitting ones. Another issue which contributes more than carbon dioxide in climate change is the production of new greenhouse gases such as freon widely used in refrigerators. The fact is that typically each molecule with more than two atoms can be considered a greenhouse gas and the contribution of each new greenhouse in climate change, warming, etc. is logarithmically proportional to its density in the atmosphere. Therefore, adding little new greenhouse gases to the atmosphere has the same effect as adding a lot of carbon dioxide, but the media are only promoting the governmental projects on carbon dioxide reduction, capture, control, etc. Therefore, one can clearly see that the political talks, claims, forums and so forth are mainly to take a nice gesture rather than a serious effort to tackle a global issue called climate change.