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Excerpts;
Twenty years ago, when the world’s leaders pledged to protect Earth’s climate and biodiversity at the Rio Earth Summit, they knew it would not be easy. But few could have guessed how much worse the situation would get. In 1992, the atmosphere held fewer than 360 parts per million (p.p.m.) of carbon dioxide; the concentration is now nearing 400 p.p.m. and surging upwards. At the same time, species are disappearing at an accelerating rate.
On the eve of the second Rio Earth Summit, Nature explores the causes and consequence of those changes, as well as the efforts that are being made to avert the worst outcomes. Our assessment shows how little progress nations have made towards honouring the commitments they made in 1992…
Read Full Article, Nature Magazine
Tipping Point?
Earth is rapidly headed toward a catastrophic breakdown if humans don’t get their act together, according to an international group of scientists.
Recovery rates reflect distance to a tipping point in a living system, Nature
Early warning of climate tipping points, Nature
A climate ‘tipping point’ occurs when a small change in forcing triggers a strongly nonlinear response in the internal dynamics of part of the climate system, qualitatively changing its future state. Human-induced climate change could push several large-scale ‘tipping elements’ past a tipping point.
