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Climate change: Arctic passes 400 parts per million milestone

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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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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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Climate 'tech fixes' urged for Arctic methane

Author: 

Richard Black
Climate 'tech fixes' urged for Arctic methane
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An eminent UK engineer is suggesting building cloud-whitening towers in the Faroe Islands as a "technical fix" for warming across the Arctic.Scientists told UK MPs this week that the possibility of a major methane release triggered by melting Arctic ice constitutes a "planetary emergency."  The Arctic could be sea-ice free each September within a few years. ... Read more about Climate 'tech fixes' urged for Arctic methane

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