If 'scientist' and 'ecologist' are not real jobs, just wondering what what qualify? What do you all do for a living? As long as its not in advertising or marketing...
So called 'Greenhouse Gases' are a problem because they prevent a greater percentage of radiant heat from leaving the atmosphere, instead reflecting it back inwards. The problem with burning fossil fuels is that it makes great changes to the Carbon cycle- thousands and thousands of pounds of carbon that have been locked away from the cycle for millions of years are now being put back in at unprecidented levels. The effects of such action is disputed, but to believe there will be no effect is naive.
If Global warming is indeed occuring, and continues to occur, one possible result, as others have mentioned, is changing of weather patterns. This can lead to some proposed advantages, such as milder climate for Siberia, but may also turn plains, often major agricultural producing centers today, into deserts.
I like the electric cars too. We could all be driving ,at the very least, electric-hybrid cars in the next few years. but, my guess is that we won't be.
Which leads me to one question I always have with the Arctic Oil Drilling push- the oil's there, its not going anywhere, no one else can come drill for it, what's the hurry? Why not save it for a rainy day when oil is really hard to get and we could definately use the extra energy? My guess is that there are some people who just really really want to be the ones to get to drill it and profit from it.