Greenhouse Gases

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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Governments failing to avert catastrophic climate change, IEA warns

Author: 

Fiona Harvey and Damian Carrington
Governments failing to avert catastrophic climate change, IEA warns
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Ministers attending clean energy summit in London to be gravely warned about continuing global addiction to fossil fuels ... Read more about Governments failing to avert catastrophic climate change, IEA warns

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Experiments Underestimate Plant Responses to Climate Change

Experiments Underestimate Plant Responses to Climate Change
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Experiments may dramatically underestimate how plants will respond to climate change in the future. That's the conclusion of an analysis of 50 plant studies on four continents, published this week in an advance online issue of the journal Nature, which found that shifts in the timing of flowering and leafing in plants due to global warming appear to be much greater than estimated by warming experiments. ... Read more about Experiments Underestimate Plant Responses to Climate Change

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Club of Rome sees 2 degree Celsius rise in 40 years

Author: 

Nina Chestney
Club of Rome sees 2 degree Celsius rise in 40 years
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LONDON, May 8 (Reuters) - Rising carbon dioxide emissions will cause a global average temperature rise of 2 degrees Celsius by 2052 and a 2.8 degree rise by 2080, as governments and markets are unlikely to do enough against climate change, the Club of Rome think tank said. ... Read more about Club of Rome sees 2 degree Celsius rise in 40 years

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Extreme heat hurts wheat yields as world warms-study

Author: 

David Fogarty
Extreme heat hurts wheat yields as world warms-study
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SINGAPORE, Jan 30 (Reuters) - Extreme heat can cause wheat crops to age faster and reduce yields, a U.S.-led study shows, underscoring the challenge of feeding a rapidly growing population as the world warms.

Scientists and farmers have long known that high heat can hurt some crops and the Stanford University-led study, released on Monday, revealed how the damage is done by tracking rates of wheat ageing, or senescence. ... Read more about Extreme heat hurts wheat yields as world warms-study

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Plan now for climate-related disasters - U.N. report

Author: 

David Fogarty and Deborah Zabarenko
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* Rising population, development put more in harm's way

* Policymakers urged to act in next few decades

* Less emphasis on mitigation, more on cutting risk

By David Fogarty and Deborah Zabarenko  

March 28 (Reuters) - A future on Earth of more extreme weather and rising seas will require better planning for natural disasters to save lives and limit deepening economic losses, the United Nations said on Wednesday in a major report on the effects of climate change.  ... Read more about Plan now for climate-related disasters - U.N. report

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