No carbon emmisions. No Carbon pollution.
Pollen in general and turpenes from pine forests are biomass generated pollution as are the gaseous products of decomposition.
Biomass does not pollute the air.
umm weel basically, we pollute rivers and land and many many other stuff like our world we live on 24:7 :)
You pollute by using any type of nonrenewable resource, letting toxins get in the air, using many air fresheners... I could go on and on. There is really no way to stop pollution altogether, for if...