The Trouble With Trees

Białowieża, the last large primeval forest in Europe                                    KW

So what is the trouble with trees? Well, no union, for one thing. And maybe we're cutting down too many for the remaining ones to be able to clean up all the pollution we continue to pump into the air. The solution, according to some, seems to be artificial replacements for the real thing. Admittedly, some are rather ingenious: http://www.care2.com/causes/7-unexpected-ways-to-fight-air-pollution.html