Eighty percent of air pollution comes from plants and trees.

Approximately 80% of our air pollution stems from hydrocarbons released by vegetation, so let's not go overboard in setting and enforcing tough emission standards from man-made sources

Trees cause more pollution than automobiles do.

Approximately 80% of our air pollution stems from hydrocarbons released by vegetation, so let's not go overboard in setting and enforcing tough emission standards from man-made sources.

But really what we're looking at is the source of the pollution and that is coal-fired power plants.

Many Brazilian landfills, such as Bandeirantes, double up as power plants. So instead of causing further pollution by burning coal or oil, they run on a fuel source that is plentiful in Sao Paolo — garbage,