Dumb eco-questions you were afraid to ask

"Over a 75-year lifespan, the average European will be responsible for
about 900 tonnes of CO2 emissions. For Americans and Australians, the
figure is more like 1500 tonnes. Add to that all of humanity's other
environmentally damaging activities and, draconian as it may sound,
the answer must surely be to avoid reproducing."

From http://www.newscientist.com/