The Secret of El Dorado (The discovery of Biochar)

https://www.youtube.com/watch?v=qqp_H95wjPE The Secret of El Dorado – programme summary In 1542, the Spanish Conquistador, Francisco de Orellana ventured along the Rio Negro, one of the Amazon Basin’s great rivers. Hunting a hidden city of gold, his expedition found a network of farms, villages and even huge walled cities. At least that is what he told…

Runaway Climate – Extreme Greenhouse Effect

https://www.youtube.com/watch?v=1uxfiuKB_R8 Publications by James E. Hansen pubs.giss.nasa.gov, his latest book is: Storms of My Grandchildren: The Truth About the Coming Climate Catastrophe and Our Last Chance to Save Humanity. Amazon.com Runaway climate change Runaway climate change describes a scenario in which the climate system passes a threshold or tipping point, after which internal positive feedback effects cause the climate to continue changing,…

The permafrost carbon feedback loop

https://www.youtube.com/watch?v=dR-4-kJUxzM THE world is on the cusp of a “tipping point” into dangerous climate change, according to new data gathered by scientists measuring methane leaking from the Arctic permafrost and a report presented to the United Nations on Tuesday. “The permafrost carbon feedback is irreversible on human time scales,” says the report, Policy Implications of…

Melting permafrost releases greenhouse gases

https://www.youtube.com/watch?v=eiotTsGKCog A UN report has warned that carbon dioxide and methane released from melting permafrost could push the climate past a tipping point and dangerously accelerate global warming. Broadcast: 28/11/2012, Reporter: Tony Jones http://www.abc.net.au/lateline/conten… Thawing permafrost may amplify global warming, U.N. reports http://www.latimes.com/news/science/s… Policy Implications of Warming Permafrost http://www.unep.org/pdf/permafrost.pdf