Air Pollution

Air pollution now kills more people than high cholesterol

Author: 

Brad Plumer
Significant changes in Life Expectancy due to Air Pollution
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The Lancet recently unveiled a major overview of global health risks — and one of the most eye-catching papers highlighted just how deadly air pollution has become over the past two decades. ... Read more about Air pollution now kills more people than high cholesterol

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Higher CO2 Levels in Atmosphere May Speed Soil Emissions

Author: 

Nathanael Massey
Higher CO2 Levels in Atmosphere May Speed Soil Emissions
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Forests may not help mitigate carbon dioxide pollution thanks to an uptick in CO2 emissions from decomposition

 

As higher levels of carbon dioxide permeate the Earth's atmosphere, scientists have long counted on forests -- which, as individual trees, grow larger in carbon-rich environments -- to soak up some of the excess.

But after nearly a decade and a half of observing forest ecosystems in controlled settings, scientists now see evidence that elevating carbon levels may cause forests to release as much extra carbon as they absorb. ... Read more about Higher CO2 Levels in Atmosphere May Speed Soil Emissions

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Climate change: Arctic passes 400 parts per million milestone

Author: 

Seth Borenstein
Climate change: Arctic passes 400 parts per million milestone
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Arctic monitoring stations show carbon dioxide levels are now above 400 parts per million. Carbon dioxide is the chief climate-change gas and stays in the atmosphere for 100 years. Before the Industrial Age, carbon dioxide levels were 275 ppm.

The world's air has reached what scientists call a troubling new milestone for carbon dioxide, the main global warming pollutant. ... Read more about Climate change: Arctic passes 400 parts per million milestone

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Development banks pledge $175bn for public transport at Rio+20

Author: 

Jonathan Watts
Development banks pledge $175bn for public transport at Rio+20
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Money will be invested in building transport systems that will reduce greenhouse gas emissions

The world's biggest development banks have made a fundamental investment shift from roads to public transport, under a $175bn (£111bn) initiative to promote buses, trains and cycle lanes that was unveiled on Wednesday at the Rio+20 Earth summit. ... Read more about Development banks pledge $175bn for public transport at Rio+20

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Pollution in China: Man-made and visible from space

Pollution in China: Man-made and visible from space
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“PM2.5” seems an odd and wonky term for the blogosphere to take up, but that is precisely what has happened in China in recent weeks. It refers to the smallest solid particles in the atmosphere—those less than 2.5 microns across. Such dust can get deep into people’s lungs; far deeper than that rated as PM10. Yet until recently China’s authorities have revealed measurements only for PM10. When people realised this, an online revolt broke out. ... Read more about Pollution in China: Man-made and visible from space

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Fundamental Steps Needed Now in Global Redesign of Earth System Governance, Experts Say

Fundamental Steps Needed Now in Global Redesign of Earth System Governance, Expe
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Some 32 social scientists and researchers from around the world, including a Senior Sustainability Scholar at Arizona State University, have concluded that fundamental reforms of global environmental governance are needed to avoid dangerous changes in the Earth system. The scientists argued in the March 16 edition of the journal Science that the time is now for a "constitutional moment" in world politics. ... Read more about Fundamental Steps Needed Now in Global Redesign of Earth System Governance, Experts Say

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