So am thinking of making a game, using WebGL, I call it 'Cool the globe'.
It is about global warming, how to stop it The means the game will be adopting is tree plantation. Dah....

So the game focuses on a boy, who thinks of stopping global warming by planting trees. But it is not easy. There are obstacles. He(You, ofcourse)  has to chose the best way possible to do it.

The player will be provided with a plot of land with nearly 24(for now) pieces of land. In each piece, it is possible to plant a tree. Each plant will grow, if watered, to become a tree going through 4 stages of its life, and finally will give fruits. These fruits will have to be sold to make money. Initially there will be 6 trees, so thats initial investment. Once we get the money we can buy new seeds and the final aim is as the timer ends, the global warming meter should be below half its level.

Now its not easy to grow trees. There are always the inevitable bad guys. Random people will come and cut down the trees. So we can avoid them by either bribing them(Time saving, money spending) or convinve them to not cut the trees(Money saving, time spending). The choice is yours.

The number of trees is inversely proportional to the amount of global warming the meter shows.

So the game is all about managing, time and money to achieve a balance in global warming :)
Cheers