Archive for July, 2009

Global warming

Tuesday, July 28th, 2009

As far as I can see there is overwhelming evidence that global warming is real, rapid and at the very least partly driven by human activities. Everything from plant hardiness zones moving north, melting sea ice, collapse of ice shelves, extremely rapid melting of glaciers and ice sheets, ecosystems moving towards the poles or to higher altitudes, and so on. In the past the speed of warming seems to have been underestimated – Read the rest of Global warming »

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Us vs the environment

Tuesday, July 7th, 2009

We humans and our technology always have been hard on the environment. Back about 13,000 years ago, in America, the Clovis people developed a way of making very effective spears for hunting mammoths. In a span of at most 450 years these huge mammoths became extinct.  Whether Clovis hunting was the prime cause can be debated – but it certainly made at least a contribution to the demise of the mammoth – and a number of other species Read the rest of Us vs the environment »

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