global warming

i believe that global warming is a real thing but unlike which side i was on at the debate i do not fully believe that. i believe that the real truth lies in between the two sides. i fully believe that the heating and cooling of the earth is a natural process.  this is supported by the fact that the earth has had periods of hot and cold times before. also the earth has changed before as evident by the fact that the Sahara desert was once a tropical place and now it is a desert.  i do believe that humans might have some effect on how this process in that we might have speed it up but not have started it. humans claim that they started global warming but in reality it is most likely part of a larger natural process that we have just speed up. the biggest thing about global warming for me is the simple fact that we do not have enough information about what has happen in the past to really know what is happening in the present.