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U.N. chief welcomes announcements made in Climate Summit

U.N. chief welcomes announcements made in Climate Summit

United Nations Secretary-General Ban Ki-moon welcomed bold new actions to addres...

Climate Summit sees intiatives and commitments

Climate Summit sees intiatives and commitments

Various bodies and entities on the Climate Summit in New York have announced the...

Climate Rally reaches 310,000 participants

Climate Rally reaches 310,000 participants

The number of people who joined the People’s Climate March this September 21 rea...

China takes big step in reducing ozone depleting gases

China takes big step in reducing ozone depleting gases

China has taken a big step towards reducing its hydrochlorfluorocarbons by closi...

Ozone layer on road to recovery – U.N.E.P., W.M.O.

Ozone layer on road to recovery – U.N.E.P., W.M.O.

The ozone layer is on the road to recovery, but unified action is still needed t...

Green vacation: Go on an eco-friendly safari

Green vacation: Go on an eco-friendly safari

The primary goal of modern-day eco-friendly African safaris is to lessen the ove...

Nepal, the Maldives, and Bhutan could lose around 2 percent G.D.P. due to climate change – A.D.B. report

Nepal, the Maldives, and Bhutan could lose around 2 percent G.D.P. due to climate change – A.D.B. report

Nepal, the Maldives, and Bhutan could be looking at economic losses of around 2 ...

Business

Technology

New oxygen-removing catalyst developed for better biofuel production

New oxygen-removing catalyst developed for better biofuel production

Thursday, 23 October 2014

Researchers from Washington State University have developed a new catalyst that can remove oxygen from plant-based materials for a more efficient biof...

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Politics

New Yorkers support renewables, opposes fracking – N.R.D.C. poll

New Yorkers support renewables, opposes fracking – N.R.D.C. poll

Sunday, 12 October 2014

A state-wide poll commissioned for the Natural Resources Defense Council reveals that New Yorkers oppose fracking and support clean, renewable energy....

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Living Green

Why saving chinchillas is important for saving the earth

Why saving chinchillas is important for saving the earth

Friday, 24 October 2014

Chinchillas make expensive pets and they are a long time commitment as well. They have a life span of around 15 to 20 years. Hence, people who adopt t...

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Renewables

World’s largest convention center solar array completed in Las Vegas

World’s largest convention center solar array completed in Las Vegas

Tuesday, 28 October 2014

The world’s largest rooftop solar array on a convention center has been completed at the Mandalay Bay Resort and Casino in Las Vegas. NRG Energy, Inc....

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Low-Carbon

What needs to be injected In the core DNA of urbanity

What needs to be injected In the core DNA of urbanity

Thursday, 23 October 2014

Urbanization has taken an unprecedented upward turn in recent years. In 2007, half of the world’s population – around 3.6 billion people – lived in ur...

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Opinion

Unsustainable urban life: What's next?

Unsustainable urban life: What's next?

Wednesday, 11 June 2014

Nutrition plays a critical role in everyone’s chance at a better future. Hunger, said Benjamin Franklin once, is the best pickle. Some say “pickle”...

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Desulfurized jet fuel has net cooling effect on atmosphere – study

A Yale University study found that the desulfurization of jet fuel could have a small, net cooling effect on the atmosphere.

While the Federal Aviation Administration has encouraged the use of desulfurized jet fuel to potentially improve air quality in airports and reduce risk of respiratory and cardiovascular illness, the Yale study points to another beneficial effect.

Sulfur-laden jet fuel, when burned, form sulfate particles that scatter solar radiation into space. It thus contributes to warming when sulfur is removed from jet fuel. However, the formation of nitrate from nitrogen oxides in jet exhaust offsets this by its own cooling effect.

"It's a win-win situation, because the sulfate can be taken out of the fuel to improve air quality around airports and, at the same time, it's not going to have a detrimental impact on global warming," said Nadine Unger, an assistant professor of climate science at the Yale School of Forestry and Environmental Studies.

The study used a model that assessed the impact of reducing the amount of sulfur in jet fuel from 600 milligrams per kilogram of fuel to 15 milligrams per kilogram, the level targeted by the United States Department of Transportation.

A paper on the study, authored by Ms. Unger and entitled "Global Climate Impact of Civil Aviation for Standard and Desulferized Jet Fuel" was published in Geophysical Research Letters in October. – Katrice R. Jalbuena



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