By Bob Willard

The 2007 Intergovernmental Panel on Climate Change (IPCC) reports state that we only have a few years in which to stabilize our greenhouse gases (GHG) before we experience irreversible and precipitous climate change.i The Millennium Ecosystem Assessment (MEA) says that 60% of the 24 ecosystems on which we depend are being degraded or used unsustainably, while the rest are in jeopardy.ii Humanity’s Ecological Footprint is already 23% larger than the planet can sustain, and it is growing.iii The United Nations Environment Programme (UNEP) Global Environment Outlook (GEO-4) says that major persistent threats to the planet such as climate change, the rate of species extinction, and the challenges of feeding a growing population, ...

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