“Global Impacts of Climate Change, - the Human Dimension: Biosphere and Human Interactions”

Human-driven climate change needs to be set against the context of how the global climate changes naturally over many thousands of years and at times quickly. Notwithstanding these, there is geological evidence suggesting that we may be about to cross a biosphere threshold.

2008 is the UN Year of Planet Earth that will look at our world mainly from a geological perspective. The climate change human activity has set in train will continue through the 21st century and beyond. This human-driven climate change needs to be set against the context of how the global climate changes naturally over many thousands of years and at times quickly. How we know what happened and the implications for the future reveal an Earth going through continual change but are we on the verge of something more serious? There are other imperatives than climate change that should compel us to kick our fossil carbon habit. Notwithstanding these, there is geological evidence suggesting that we may be about to cross a biosphere threshold. This is something about which the 2007 IPCC report gives only a brief hint

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