Monday April 22, 2019

Cutting Carbon emissions can increase world hunger : New Study

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New York: As several nations brace for implementing plans to cut greenhouse gas emissions, such efforts to rein in global temperatures may lead to more people going hungry, a new study suggests.

“That risk doesn’t negate the need for mitigation, but highlights the importance of comprehensive policies,” said lead researcher Tomoko Hasegawa, National Institute for Environmental Studies in Japan.

Previous studies have shown, that climate change reduces how much food farms can produce, which could lead to more people suffering from hunger.

Curbing the greenhouse gas emissions that lead to climate change can help maintain the yields of existing crops.

But there might be indirect ways in which cutting emissions could actually put more people at risk of going hungry, said the study published in ACS journal of Environmental Science & Technology.

“For example, some grasses and other vegetation used for bio fuels, require agricultural land that might otherwise be used for food production. So, increased bio fuel consumption could negatively affect the food supply,” Hasegawa noted.

Also, the high cost of low-emissions technologies, such as carbon capture and storage will be borne by consumers, who will then have less money to spend on food.

The researchers used multiple models to determine the effects of strict emissions cuts, and found that many more people would be at risk of hunger then, more than if those cuts weren’t in place.

The team concluded that governments will have to take measures, such as increasing food aid, as they address climate change. (IANS)

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Researchers Turn Carbon Emissions into Usable Energy

With the "Hybrid Na-CO2" System, the conversion efficiency of CO2 is high at 50 per cent at this time

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EMission, carbon dioxide
Researchers turn carbon emissions into usable energy. VOA

A team of researchers has developed a system that produces electricity and hydrogen while eliminating carbon dioxide (CO2), which is the main contributor of global warming.

The team from the Ulsan National Institute of Science and Technology in South Korea created a “Hybrid Na-CO2” system that can continuously produce electrical energy and hydrogen through efficient CO2 conversion, with stable operation for over 1,000 hour without any damage to electrodes.

“The key to that technology is the easy conversion of chemically stable CO2 molecules to other materials. Our new system has solved this problem with CO2 dissolution mechanism,” said Professor Guntae Kim from the School of Energy and Chemical Engineering at UNIST.

Much of human CO2 emissions are absorbed by the ocean and turned into acidity.

Car Emissions, carbon dioxide
Morning rush hour traffic makes its way along US 101 near downtown Los Angeles, California, Nov. 15, 2016. VOA

The researchers focused on this phenomenon and came up with the idea of melting CO2 into water to induce an electrochemical reaction.

If acidity increases, the number of protons increases, which in turn increases the power to attract electrons.

If a battery system is created based on this phenomenon, electricity can be produced by removing CO2.

Also Read- Chronic Doctor Shortage Affecting Delhi Government-run Hospitals

With the “Hybrid Na-CO2” System, the conversion efficiency of CO2 is high at 50 per cent at this time.

“This hybrid Na-CO2 cell not only utilises CO2 as the resource for generating electrical energy but also produces the clean energy source, hydrogen,” said Jeongwon Kim from UNIST in a paper published in the journal iScience. (IANS)