A recent study concluded that a poll of Earth scientists found that 97.4% of climate scientists believe that humans are contributing significantly to global warming. So there are a few who aren't convinced, but they don't really have any scientific evidence to support their position. And you're never going to get all scientists agreeing on any theory. I'm sure there are plenty who don't believe the evolutionary theory is correct.
Whether or not we can sufficiently slow global warming, and how much we have to do to accomplish this is another question where there is much debate and research. However, most scientists are in agreement that we can still avoid catastrophic climate change, and that it will take significant greenhouse gas emissions reductions to do so.