In my opinion, there is certainly enough scientific data to believe that global warming is occuring and a definite threat. Even if global warming will not affect the earth for many, many years, it is still something we should take into consideration. The problem seems to be that people either do not want to change their lifestyles or they do not want to believe that the earth could cease to exist. Either way, many people will not change their ways of life to help minimize global warming. If we just took simple steps, such as buying hybrid cars, we could greatly minimize global warming. Furthermore, we would have cleaner air. Thus, the changes we would make would help in several areas of health.