Global emissions of carbon dioxide (CO2) from fossil-fuel combustion rose by 3.2 percent last year to a record high of 31.6 gigatonnes, the IEA said in preliminary estimates released on Thursday.

China made the biggest contribution to the global rise, seeing its emissions increase by 9.3 percent, the Paris-based International Energy Agency said.

U.S. emissions fell 1.7 pct in 2011, mainly due to a switch to natural gas from coal in power plants and also a very mild winter that cut heating demand, the IEA said.

Scotland's University of Edinburgh on Wednesday opened a centre to research the use of carbon to retrieve oil otherwise hard to extract from reservoirs, a method which could unlock three billion barrels of trapped North Sea oil worth 190 billion pounds ($300 billion).

A number of developers of carbon capture and storage (CCS) projects have already suggested using the method, also known as enhanced oil recovery (EOR) that has been used in North America for decades, to enhance the economic viability of their plants which are expensive to finance.

Large-scale crop plantations are expanding at a rapid pace across southeast Asia, with multinational firms often benefiting the most at the expense of local communities and the environment, two U.N. rights experts warned on Wednesday.

Demand for agrofuels, such as those derived from sugar cane and palm oil, has boomed thanks in part to the United States, Europe and other rich economies seeking alternative ways to fuel their cars and homes in order to reduce their carbon emissions.

Killer heat fueled by climate change could cause an additional 150,000 deaths this century in the biggest U.S. cities if no steps are taken to curb carbon emissions and improve emergency services, according to a new report.

The three cities with the highest projected heat death tolls are Louisville, with an estimated 19,000 heat-related fatalities by 2099; Detroit, with 17,900, and Cleveland, with 16,600, the Natural Resources Defense Council found in its analysis of peer-reviewed data, released on Wednesday.

Two large overseas investors in the UK energy market have joined the chorus of criticism of the government's new energy bill.

The German-based E.ON, one of the big six electricity providers in Britain, said national subsidy schemes for renewables such as Britain's contracts for difference had helped "bust" key European carbon reduction initiatives.

And Norway's Statkraft, said on Wednesday it would not be able to press the button on a giant £30bn offshore wind farm on the Dogger Bank until ongoing "uncertainty" was lifted.

At the Camp David meeting last week, G8 leaders agreed to act on climate change and air pollution by focusing on methane, black carbon (soot), and hydroflurocarbons (HFCs).

This is the logical follow up of a move in the same direction by the United States, China and other countries back to February. However, like the previous agreement, CO2 is still not mentioned.

The aforementioned greenhouse gases are much more potent but remain for much less time in the atmosphere than carbon dioxide

An aviation conference in Beijing on Wednesday saw leaders of the industry voice strong concern over a European Union (EU) plan to tax international airlines for carbon emissions, and an EU official signal a more flexible attitude from the bloc.

Chinese and US aviation authorities and industry associations reiterated opposition to the EU Emissions Trading Scheme (ETS) at the 2012 China Civil Aviation Development Forum, urging the EU to take a global and comprehensive approach to the issue.

China's civil aviation authority on Wednesday reiterated its opposition to the European Union's imposition of an emissions trading scheme on global aviation, despite a threat from the EU last week to punish Chinese airlines for not cooperating.

As talks have so far proven futile, the parties involved expect that a framework of market-based measures, which will be submitted next year to the International Civil Aviation Organization Assembly for review, might put an end to disputes over the issue.

The draft energy bill plans major changes to the market, causing concern that consumers' bills could rise and renewable energy is being neglected

The biggest reforms to the UK energy sector in two decades were set out on Tuesday, prompting warnings from consumer groups and green campaigners that they would raise bills and penalise renewable energy while boosting nuclear power.

The sweeping reforms, detailed in the draft energy bill, grant the government powers to intervene in the market on a scale not seen since the industry was privatised.

Bavaria's stock exchange will abandon its carbon emissions certificate trading operations in the EU-traded CO2 market on June 30 after volumes in Europe "plunged to practically zero" in recent months, it said on Tuesday.

The EU's emissions trading scheme (EU ETS) limits the carbon dioxide emissions of the 27-nation bloc's factories and power plants and covers nearly half of EU emissions.

Prices in the ETS have shed around 60 percent of their value over the past year due to market worries about the growing supply glut and weak demand.