Bart asks:Why do some people still say that global warming is a hoax?

Too many people I think have their hands in the jar trying to make a buck... it's too bad that oil companies have soo much money to pay of some "scientist" ...

If anyone has any doubt watch that movie.

I believe there is definite global warming, caused in part by us, but also due to inevitable changes in the Earth.

I think most people who believe global warming is a hoax are in denial and don't want to believe that there could be something seriously wrong with our world.

instead of getting their information in sound bites maybe they have actually researched it. As for the Al Gore movie, the cornerstone of that movie was PROVEN FALSE. In the Al Gore movie, "An Inconvenient Truth", we see the famous hockey stick chart as proof that global
warming is sweeping the Earth. Time and research has taken its toll on that chart. It is no longer regarded as accurate. In fact, it has been quietly dropped by the United Nations Intergovernmental Panel on Climate Change. That wasn't covered in a media soundbite however. It was never mentioned except in a few research briefs.
We have sporadic records dating back about 500 years, mostly in written historical accounts....the most conclusive records we have are only about 100 years old. The charting on the Arctic and Antarctic ice? You will love this: 1976. Only 33 years of data for a planet 4.5 billions years old.

own agenda... and this goes for both sides.. there are those that exaggerate the dangers and those that play them down. Global warming is happening, but it is not all our fault.. we may be speeding up the process, but it is still part of a regular cycle. Trouble is that now man is around and inteligent, he wants to change things.. in past millenia the planet did what it wanted and primative man just had to go along with it..

many people are so busy with their materialistic lives that even if they hear things like global warming and the fate of the planet they do not want to listen...because the daily grind seems more important than the planet I suppose

So many people enjoy a financial benefit from the status quo that any change in how we live is dangerous to their pocket book and sense of power.