DonQuijote1954 ) writes:

There's a dialog in 'The Matrix' in which one of the humanoids says we
human beings are the only living beings, outside of a virus, to
destroy its own home. Maybe we will meet our own medicine.

We are certainly changing the environemnt, but you'll have to define
"destruction". if we humans die out the land and water will still be here
and sombody else will take over. However we humans are not causing any
significant warming of the earth's climate. There are far greater forces
at play such as the cyclical increase in sunspot activity. The sun's
radiation is not a constant but fluxuates over hundreds of years with
shorter cycles of 11 or so years. The data show that radiation has been
increasing in line with the slight rise surface temperature on our planet.
NO doubt they are getting the same effect on Mars where there are no
automobiles or air conditioners.

I mentioned the 11 solar cycle because it has a definte effect on some
animal species. The wild rabbit population is known to rise and fall with
the 11 year solar cycle. I assume any paddlers with an interest in the
conservation will be familiar with that.
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