Replying to What if they're wrong?

Okay, so I saw a trailer for the movie "The 11th hour" earlier this week, and I was thinking about some of the stuff they mentioned in it today... Apparently, the government has a plan that, if implemented, would reduce the carbon footprint of th human race by something like 90%. Now obviously a plan with huge and radical changes like that would be very hard, and very costly to carry out, and would prove to be a huge inconvenience for everyone...

OK, so imagine that they carry that out, takes 20 years, costs a lot of money, etc. etc.
Now... imagine that someone finds undeniable evidence that Global Warming (or Global Climate Change) is a HOAX, and that everything that had been changed was a waste of time and money...

Riots?
Chaos?
... order?
....... no one would care??