stella, I am no expert, however I have read about and heard the science community give opinions and data about how the climate is changing, I take their opinions to be the best I have, climate change, may not have an impact for many years, say for example 100 yrs. if it was happening now after 100/200 yrs, I don't think I would be happy with the previous generations. if I had to watch my grand children suffer the consequences, surely it cant do any harm to go along with the science.