You can go to all the green rallies you like.
You can write your congressperson in an inflammatory tone.
You may be outraged about the environment, and you may think you can do something to help.
You can't.
Try driving 90 minutes through bumper to bumper traffic in Sao Paulo and see how your lungs feel, and imagine what it would take to change things. Now imagine Beijing, Rio, Moscow, and Mexico City, a symphony of atmospheric sodomy.
You may want to consider the neutron bomb for starters.
I staggered into my hotel room, nauseous and dizzy from the fumes of 50,000 diesel trucks, cabs, and fiats. I showered the grime off of myself and took a nap. I dreamt that I was in Pakistan, underneath a pile of sand, struggling breath by breath.