For any of you that are interested
this link will give you a picture of how far smoke can spread. I wondered if all the smoke we experience in Tasmania is somehow responsible for reduced rainfall, based on the assumption that mositure needs some form of particle to condense, but excess particles in the air would cause droplets not to form rather just small amounts of moisture attaching to individual particles rather than clumping as droplets. Well a quick google search has at least confirmed my thoughts, it seems that excess smoke does cause a reduction in rainfall, as well as having an additional greenhouse effect, as detailed in
this link.
I really beleve that our evironment is at crisis point, scientific evidence is no longer necessary, just use your powers of observation, think about what's happening and more importantly take some action. In a few more years it may be too late.