According to the Washington Post, one forward-thinking California city--Sacramento--is taking on the global warming challenge in a smart, simple way: free trees.
"About 375,000 shade trees have been given away to city residents in the past 16 years, and there are plans to plant at least 4 million more. To receive up to 10 free trees, residents simply call the Sacramento Municipal Utility District, a publicly owned power company."
The article discusses the reduction in tree canopies occurring in most major American cities as development has increased. Shade trees can lower summertime temperatures in cities, reduce air conditioning costs, and trap greenhouse gases.
So congratulations to Sacramento. I think we should all be nudging our own cities to follow suit.