I think there's a few years left in this planet, but some serious efforts need to be made to make it last. I remember being told many times in the late 80's that there's only 20 years of oil left in the world, what a load of rubbish! I think the world is over populated, and with many developing countries in Asia and Africa it will really stretch the resources of the planet and can only add to pollution levels.
I don't think the slight changes in our weather patterns are a huge concern. I think a lot of the panic is because we only have accurate records that go back a hundred years or so to campare todays weather with. I think if we had records that went for a few thousand years it would show that weather patterns change a lot more than we think.
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We see the Japanese about to recommence whaling
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I was lucky enough to go for a tour on a Collins class submarine last week. I think one of them surfacing next to a whaling boat would scare them out of Australian waters pretty quickly!