@yankieGirl - 'Cause and effect' dictates that of our actions on this planet effect our locality, country, planet, galaxy, universe - blah blah
If you believe we are part of a 'normal cycle' by polluting, destroying and wasting natural limited resources then you must obviously believe that as a cycle there must have been another previous intelligent species, otherwise maybe its time to admit that this maybe the first time our planet has has to deal with our modern day pollutions?
That saying I can understand your scepticism, the 'green bandwagon crew' are very prevalent I think everywhere and some of the government schemes like carbon offsetting and stuff are just a joke.
I'm aware that I am a part of climate change - that saying I still leave the tractor on tickover all day because I cant be arsed to jumpstart it

As for a mini ice age - I'll worry about it if it happens - bbrrrr hope not to soon.
Baz