Germany has asked for discussion on deeper EU carbon emissions cuts to be put on the agenda at a meeting of environment ministers in June, EU sources said.

If agreed, a more ambitious target could help to spur the European Union's carbon market, which has sunk to record lows.

Previous debate of bigger carbon cuts, however, has been difficult, with coal-reliant Poland objecting that they could damage its economy.

Germany has asked for discussion on deeper EU carbon emissions cuts to be put on the agenda at a meeting of environment ministers in June, EU sources said.

If agreed, a more ambitious target could help to spur the European Union's carbon market, which has sunk to record lows.

Previous debate of bigger carbon cuts, however, has been difficult, with coal-reliant Poland objecting that they could damage its economy.

German utility RWE started construction of its fourth wind farm in Poland on Thursday as part of a renewable energy development plan, even though the government aims to cut the amount of state support for wind by a quarter.

Poland, which must meet tough European Union renewable targets by 2020, is currently overhauling its renewable support plan.

"The new wind farm will confirm RWE's position as one of the largest investors in wind energy in Poland," RWE said in a press statement.

Polish state-controlled power company PGE said it won permits to build three wind farm projects on the Baltic Sea with a combined potential capacity of 3.45 gigawatts, taking the lead in the development of Poland's offshore wind industry.

Poland, which produces around 90 percent of its energy from coal, is obliged by the European Union to increase the share of renewables in its energy mix to 15.5 percent by 2020. It currently has no operational offshore wind farms.

European Union ambassadors failed to resolve a dispute over the allocation of seats on the United Nations' Green Climate Fund (GCF) board on Friday, possibly undermining the bloc's credibility in international climate talks.

The EU envoys were meeting for the second time in a week to decide which European nations will be represented on the governing board. This has 12 seats for developing countries and another 12 for developed countries.

European Union ambassadors failed to resolve a dispute over the allocation of seats on the United Nations' Green Climate Fund (GCF) board on Friday, possibly undermining the bloc's credibility in international climate talks.

The EU envoys were meeting for the second time in a week to decide which European nations will be represented on the governing board. This has 12 seats for developing countries and another 12 for developed countries.

European Union ambassadors were due to meet on Wednesday in an effort to settle a dispute over the allocation of seats to member states on the United Nations' Green Climate Fund (GCF) board, sources close to the matter said.

U.N. climate talks in Durban last year agreed on the design of the fund, which is aimed at channeling up to $100 billion a year to help developing countries adapt to climate change.

Big business will prove an unexpected ally of the European Commission in pushing for firm policy to cut carbon after existing 2020 targets expire, as companies draw up their own plans for a future of greener power.

Many business leaders, independent of official European Union policy, take the view that locking into fossil fuels creates the danger of stranded assets when a low-carbon grid looks more and more likely.

Coal-reliant Poland on Friday vetoed European Union efforts to move further towards a low carbon economy, pitting itself against the rest of the 27-member bloc.

Denmark, holder of the rotating EU presidency, has placed the environment at the heart of its leadership, backed by the Commission and the business community on the need for clear direction on EU climate policy beyond an existing set of 2020 goals.

Drilling at Poland's first shale gas exploration well using the controversial technique known as fracking has not harmed the environment, according to a government study published on Friday.

Hydraulic cracking, or fracking, performed at a site in northern Poland operated by 3Legs Resources did not pollute groundwater or the atmosphere, said the study by the Polish Geological Institute.