How can you use your brain to help the environment? Since the U.S. is the largest contributor of greenhouse gases - individual Americans, by changing their lifestyle slightly, can make the most difference.
If you want to learn more, read about how a science teacher in Massachusetts cut his energy bill by 2/3 through simple household changes. Slight changes, since they are easy to carry out, can make a greater difference than major initiatives requiring civic, regional, or national legislation (also, no need for bureaucratic ennui).
In the last 100 years since temperatures have been measured, five of the hottest ten years on record have occurred in this past decade.
Some of the simple things you can do to "cool down" the earth, including what the wise teacher did, are listed in this article. Small actions, like aggregate 'cooling' due to the air circulation from the beating wings of a 100 million butterflies, just might make the difference in reversing environmental change.