New research, to be published in the journal Climatic Change in November, suggests humankind may have to remove carbon dioxide (CO2) from the atmosphere on a vast scale if emissions keep rising after 2020.

The series of articles provide scenarios which will form the basis of the next report by the U.N.'s Intergovernmental Panel on Climate Change (IPCC) in 2013 and 2014.

Greenpeace has shifted its campaign focus toward confronting polluting companies, away from lobbying deadlocked U.N. climate talks, the global head of the environmental group told Reuters on the eve of its 40th anniversary.

The group was exploring a new strategy to target banks which backed fossil fuel companies and nuclear power as well as forest destruction, said Kumi Naidoo.

U.N. climate negotiations have fallen short of a treaty after an acrimonious summit in Copenhagen in 2009 when world leaders failed to agree binding cuts in greenhouse gas emissions.

Arctic sea ice this summer melted to a record low extent or will come a close second, two different research institutes said on Tuesday, confirming a trend which could yield an ice-free summer within a decade.

The five biggest melts in a 32-year satellite record have all happened in the past five years, likely a result of both manmade climate change and natural weather patterns.

A dream climate change cure to turn planet-warming greenhouse gases into useful products from jet fuel to plastics will take years to develop from the lab and pilot projects, a report found on Thursday.

Pilot projects already use carbon dioxide (CO2) to feed plants, for example to boost tomatoes in glasshouses, while laboratories have tested the manufacture of concrete, plastics and oils, but c

Britain will exclude details of support for green energy under power market reform plans it is due to unveil next week, say sources familiar with the statement which may disappoint investors and developers.

The proposals will center around a guaranteed purchase price for low carbon electricity, critically widening existing renewable energy support to include nuclear power.

But the plans, whi

Canada confirmed on Wednesday that it would not support an extended Kyoto Protocol after 2012, joining Japan and Russia in rejecting a new round of the climate emissions pact.

The current Kyoto Protocol binds only the emissions of industrialized countries from 2008-2012. Poor and emerging economies want to extend the pact, creating a deadlock at U.N.

Small island states, at risk from rising seas due to climate change, hinted on Tuesday at a compromise in order to kick-start U.N.

Slowing deforestation and greater awareness of the value of standing trees may come too late to save the world's biggest rainforests, according to a global assessment of tropical forests published Tuesday.

Tropical forests are threatened by pressures to clear land to produce food and biofuels and to plant fast-growing trees for timber, wood fuel and paper.

Awareness was growing in tropical c

U.N. talks have run out of time to meet a December 2012 deadline to put in place a binding successor to the Kyoto Protocol on curbing greenhouse gases, the U.N.'s top climate official said Monday.

The main aim of the U.N.

Wood fuel, one of the oldest energy sources on the planet, could become the newest commodity market if it can overcome supply limits and green concerns as demand grows for renewable energy.

Supply constraints are starting to put wood fuel into competition with the paper industry, experts say, in an uneasy reminder of existing tension between the food industry and companies making biofuels from