monckton wipes the floor with dennis, page-68

LouL

Re air pollution - from Wikipedia

"Pollution is the introduction of contaminants into a natural environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms.[1] Pollution can take the form of chemical substances or energy, such as noise, heat, or light. Pollutants, the elements of pollution, can be foreign substances or energies, or naturally occurring;

when naturally occurring, they are considered contaminants when they exceed natural levels. ..."

http://en.wikipedia.org/wiki/Pollution