arahat, i don't deny that human activities is also contributing to global warming, however, i strongly oppose that this is the main cause of global warming. the earth is going to witness another period of global warming whether human do some contributing activites or they don't do anything, this is going to happen anyway, so my suggestion is only that before we conclude big model of climate change we need to know and include all possible variables that can play role, and there is a big group of people whose job is always making this kind of big issue of little things. and i am not telling any fairy's tale, this is my field where i am working for 10 yrs. just analyze the figure i have posted above and google for the possible reasons behind this and if you don't get anything on that then i will tell you about that

and Namaskar, i just used that link to download the picture as google gave me that site on my first hit. i can give you hundreds of reference on this.

and lastly novaguy83 you better do your own job, at least i don't need your suggestion on what i need to do