Discard the "someone else will solve it" and "what difference can one person make" attitudes.
Go see An Inconvenient Truth.
Why let a bunch of big companies continue to tell you that something isn't bad for you so that they can make more profit before the shit hits the fan? Surely everyone learned by now that the cigarette companies don't have your best interests at heart. Why should anyone think oil and car companies are different when they argue against scientists?
We really don't have any more time to waste.