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Chapter 7. Grain Yields Starting to Plateau - Full Planet, Empty Plates: The New Geopolitics of Food Scarcity

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Full Planet, Empty Plates: The New Geopolitics of Food Scarcity

Chapter 7. Grain Yields Starting to Plateau

by Lester R. Brown

From the beginning of agriculture until the mid-twentieth century, growth in the world grain harvest came almost entirely from expanding the cultivated area. Rises in land productivity were too slow to be visible within a single generation. It is only within the last 60 years or so that rising yields have replaced area expansion as the principal source of growth in world grain production.

Chapter 7. Grain Yields Starting to Plateau
http://www.earth-policy.org/books/fpep/fpepch7

Full Planet, Empty Plates: The New Geopolitics of Food Scarcity
http://www.earth-policy.org/books/fpep

( ALSO SEE - http://resiliencesystem.org/chapter-4-food-or-fuel-full-planet-empty-plates-new-geopolitics-food-scarcity )

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Today's Climate Change Proves Much Faster Than Changes in Past 65 Million Years

NASA finds thickest parts of arctic ice cap melting faster. Image: Flickr/NASA Goddard Space Flight Center

submitted by Neal Lipner

Climate change is occurring 10 to 100 times faster than in the past and ecosystems will find it hard to adjust

CLICK HERE - RESEARCH REPORT - Abstract - Changes in Ecologically Critical Terrestrial Climate Conditions

scientificamerican.com - by Anne C. Mulkern and ClimateWire - August 2, 2013

The climate is changing at a pace that's far faster than anything seen in 65 million years, a report out of Stanford University says.

The amount of global temperature increase and the short time over which it's occurred create a change in velocity that outstrips previous periods of warming or cooling, the scientists said in research published in today's Science.

If global temperatures rise 1.5 degrees Celsius over the next century, the rate will be about 10 times faster than what's been seen before, said Christopher Field, one of the scientists on the study. Keeping the temperature increase that small will require aggressive mitigation, he said.

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Rising Sea Levels Could Submerge Substantial Parts of 1,700 U.S. Cities

      

This may soon be what a day in the park looks like. Reuters/Jitendra Prakash

theatlanticcities.com - by Roberto A. Ferdman - July 30, 2013

Sea levels, as we know, are incredibly sensitive to rises in global temperatures. A study released earlier this month revealed that the increase of a mere degree celsius could lead global sea levels to rise by as much as two meters. But according to a new study published in the Proceedings of the National Academy of Sciences, the implications are especially grim for the US. At the current rate of carbon emissions, over 1,700 cities, including New York, Boston and Miami, will be “locked in” by greenhouse gas emissions by this century’s end.

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Thai Oil Spill Having Extreme Impact on Tourism - Minister

      

Thai soldiers wearing biohazard suits take part as cleaning operations continue at Ao Prao Beach on Koh Samet, Rayong July 31, 2013. REUTERS/Athit Perawongmetha

reuters.com - by Amy Sawitta Lefevre - July 30, 2013

(Reuters) - An oil spill that has blackened beaches at a Thai holiday island was having an extreme impact on tourism and could spread to the coast of the mainland and affect the fishing industry, officials and an environmental group said on Tuesday.

Tourists were pouring off the island of Koh Samet, 230 km (142 miles) southeast of Bangkok, while soldiers and volunteers in white bio-hazard suits struggled to clear black oily sludge off the white sand.

"We're working to move visitors to other locations if they want to move," Tourism Minister Somsak Phurisisak told reporters.

"I'm very concerned, I didn't think this spill would impact tourism in such an extreme way."

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Hundreds of Dead Stingrays Found on Mexico Beach

      

Hundreds of dead stingrays have been found on a beach in the eastern Mexican state of Veracruz.  Reuters

bbc.co.uk - July 17, 2013

. . . Veracruz's Environment Minister Victor Alvarado Martinez has asked federal authorities for help investigating the incident. . .

. . . Chachalacas fisherman Jaime Vazquez said that in his more than three decades in the job he had ever seen any of his colleagues dump dead fish on the beach.

He told local media that any unwanted fish would have been returned to the sea while still alive.

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Arctic Methane Time Bomb Could Have Huge Economic Costs

      

Increasing temperatures in the Arctic region are reducing sea ice cover and increasing the possibility of methane leaching from the sea bed

bbc.co.uk - by Matt McGrath - July 24, 2013

Scientists say that the release of large amounts of methane from thawing permafrost in the Arctic could have huge economic impacts for the world.

The researchers estimate that the climate effects of the release of this gas could cost $60 trillion (£39 trillion), roughly the size of the global economy in 2012.

The impacts are most likely to be felt in developing countries they say.

The research has been published in the journal Nature.

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RESEARCH - NATURE - Climate science: Vast costs of Arctic change

Climate science: Vast costs of Arctic change (3 page .PDF file)

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Global Warming and the Future of Storms

submitted by Albert Gomez

      

Hurricane Sandy battered towns along the United States east coast. Photograph: Scott Eisen/REUTERS

New research by Kerry Emanuel suggests that hurricanes will become more frequent and more intense

guardiannews.com - by John Abraham - July 26, 2013

Very recently, a publication appeared by perhaps the world's best-known hurricane scientist, Dr. Kerry Emanuel of MIT. Dr. Emanuel combined global computer simulations with more regional simulations to look into the future at the evolution of storms. What he found was surprising.

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STUDY - Downscaling CMIP5 climate models shows increased tropical cyclone activity over the 21st century
http://www.pnas.org/content/early/2013/07/05/1301293110.abstract

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Dangerous Global Warming Could Be Reversed, Say Scientists

      

We’re going to need a bigger bucket of water.  Shutterstock

grist.org - by Natalie Starkey - July 14, 2013

Global warming could be reversed using a combination of burning trees and crops for energy, and capturing and storing carbon dioxide underground (CCS), according to an analysis by scientists. But experts cautioned that trying such an approach after temperatures had passed dangerous levels could be problematic, as climate change reduced the number of trees available for “bioenergy.”

The bioenergy and CCS method was the most cost-effective way of tackling carbon emissions, said the team at Chalmers University of Technology in Sweden, publishing their research in the journal Environmental Research Letters on Thursday.

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Research - Meeting global temperature targets—the role of bioenergy with carbon capture and storage
http://iopscience.iop.org/1748-9326/8/3/034004/article

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Fossil Fuel Use Pushes Carbon Dioxide Emissions into Dangerous Territory

 
earth-policy.org - by Emily E. Adams
July 23, 2013

Increasing global emissions of carbon dioxide (CO2), a heat-trapping gas, are pushing the world into dangerous territory, closing the window of time to avert the worst consequences of higher temperatures, such as melting ice and rising seas. Since the dawn of the Industrial Revolution, carbon emissions from burning fossil fuels have grown exponentially. Despite wide agreement by governments on the need to limit emissions, the rate of increase ratcheted up from less than 1 percent each year in the 1990s to almost 3 percent annually in the first decade of this century.

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Climate Change is Happening Too Quickly for Species to Adapt

      

Species that live on mountains, such as the snow leopard, are particularly at risk. Photograph: Tom Brakefield/Getty Images

guardian.co.uk - by Robin McKie - July 13, 2013

Among the many strange mantras repeated by climate change deniers is the claim that even in an overheated, climate-altered planet, animals and plants will still survive by adapting to global warming. . .

. . . However, their rate of change turns out to be painfully slow, according to a study by Professor John Wiens of the University of Arizona. . . The results, published online in the journal Ecology Letters, show that most land animals will not be able to evolve quickly enough to adapt to the dramatically warmer climate expected by 2100.

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