Dr. Hansen gave a video lecture at NASA on May 21, 2013, in a 45 minute presentation with question and answer. His presentation gave an overview of his approach, and how he got involved in climate change and what his motivation is now for speaking out on a very complex science issue. He's now taking a very public stance on climate change after retiring from his position at NASA in order to speak out with the necessary urgency and clarity. He has developed extensive resources on climate change and developed research papers with his team of scientists. A Ted Talk video from February 2012 documents his reasons for retiring from NASA to raise the climate alarm with the public and US government policymakers.
What this slide above is showing is that coal and unconventional recovery of oil and gas are not acceptable as future sources of energy, and along with that, methane hydrate processes which add to the forcing of climate change.
There will need to be a very drastic and immediate change in the way that the global economy operates and procures the necessary energy to keep our systems of commerce and trade in place without the destruction of the ecosphere.
Update 2/10/19: Dr. Hansen's website with his papers, maps and publications is here.
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