Let's look at states who are doing 'something' . I just visited California and noticed how much higher gas prices are there. It appears the state has implemented a global warming tax on energy to help save the world. Of course the roads are still packed full and people are not driving less. So all they are really accomplishing is raising tax revenues in a way which disproportionately impacts the middle class and poor. But being against idiotic dishonest policies puts you in the 'denier' camp where you should be ridiculed and perhaps beheaded.
All you have to believe in is cause and effect to understand that humans contribute in some fashion to the course of warming/cooling. However, you have to know a HECK of a lot more than we currently do before we can realistically do anything about it.
Things we still really don't know:
What is best, warmer, colder, or status quo. Status quo is clearly least risky as it is tested, but it may not be best.
How to regulate global temperatures... we really have no clue.
Which factors of humanities impact have the strongest impact on global warming... most assume carbon emissions, but I contend the jury remains out on that to this day
I staunchly oppose actions until those above questions can be definitively answered. In the meantime, we should be funding WAY more research than we are.