Research paper's 1st paragraph

There are very few people who have not seen or at the very least heard of Al Gore's The Convenient Truth. Mr. Gore presents all of these facts to his audience that we are now going through a process known as global warming. Global warming is an increase in the earth's average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect. With Mr. Gore pointing the blame at the rest of humanity it really makes me question how much he is actually doing to help the environment? Or do those who speak so loudly for those known as the "environmentalists", actually listen to what they themselves preach? It is a shocking truth to know that those who speak the loudest are actually apart of the cause themselves.