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Showing posts with label Carbon Capture and Sequestration. Show all posts
Showing posts with label Carbon Capture and Sequestration. Show all posts

Saturday, 17 September 2016

Our best shot at cooling the planet might be right under our feet Ref: Global Dev Professionals Network_The Guardian UK

Our best shot at cooling the planet might be right under our feet.- brought to us by the Global Development Professionals Network.



Global temperature record brocken:

"Every one of the past 14 months has broken the global temperature record. Ice cover in the Arctic sea just hit a new low, at 525,000 square miles less than normal. And apparently we’re not doing much to stop it: according to Professor Kevin Anderson, one of Britain’s leading climate scientists, we’ve already blown our chances of keeping global warming below the “safe” threshold of 1.5 degrees." quoted from the Guardian.


Global Temperature Targets and how to achieve them

"If we want to stay below the upper ceiling of 2 degrees, though, we still have a shot. But it’s going to take a monumental effort. Anderson and his colleagues estimate that in order to keep within this threshold, we need to start reducing emissions by a sobering 8%–10% per year, from now until we reach “net zero” in 2050. If that doesn’t sound difficult enough, here’s the clincher: efficiency improvements and clean energy technologies will only win us reductions of about 4% per year at most." 


Quick look


"Maybe our engineers are missing the point. The problem with geo-engineering is that it proceeds from the very same logic that got us into this mess in the first place: one that treats the land as something to be subdued, dominated and consumed. But the solution to climate change won’t be found in the latest schemes to bend our living planet to the will of man. Perhaps instead it lies in something much more down to earth – an ethic of care and healing, starting with the soils on which our existence depends.

Of course, regenerative farming doesn’t offer a permanent solution to the climate crisis; soils can only hold a finite amount of carbon. We still need to get off fossil fuels, and – most importantly – we have to kick our obsession with endless exponential growth and downsize our material economy to bring it back in tune with ecological cycles. But it might buy us some time to get our act together." ref The Guardian
Well known but quickly forgotten. 
"Feeding the world isn’t about higher yields; it’s about fairer distribution. We already grow enough food for 10 billion people. In any case, it can be argued that regenerative farming actually increases crop yields over the long term by enhancing soil fertility and improving resilience against drought and flooding. So as climate change makes farming more difficult, this may be our best bet for food security, too." 


READ MORE? 


1. Our-best-shot-at-cooling-the-planet-might-be-right-under-our-feet? from The Guardian Global Development Professionls Network


REFERENCES brought to us by the Guardian


a) PNAS Proceedings of the National Academy of Sciences

Enhanced top soil carbon stocks under organic farming 

read for free at their link above.

Friday, 25 September 2009

Coal_Carbon Capture and Sequestration by Steven Chu U.S. Secretary of Energy and a Nobel Laureate in physics, G20?

Carbon Capture and Sequestration

Steven Chu

Overwhelming scientific evidence shows that CO2 emissions from fossil fuels have caused the climate to change, and a dramatic reduction of these emissions is essential to reduce the risk of future devastating effects. On the other hand, access to energy is the basis of much of the current and future prosperity of the world. Eighty percent of this energy is derived from fossil fuel. The world has abundant fossil fuel reserves, particularly coal. The United States possesses one-quarter of the known coal supply, and the United States, Russia, China, and India account for two-thirds of the reserves. Coal accounts for roughly 25% of the world energy supply and 40% of the carbon emissions.* It is highly unlikely that any of these countries will turn their back on coal any time soon, and for this reason, the capture and storage of CO2 emissions from fossil fuel power plants must be aggressively pursued.

Steven Chu is the U.S. Secretary of Energy and a Nobel Laureate in physics.


Source:
Science, 25 September 2009 (Volume 325, Issue 5948), free alerts