The European Commission is set to unveil a series of proposals for addressing climate change up to 2030 today, including a target to cut greenhouse gas emissions across the EU, which is expected to be around 40% on 1990 levels.
But in the face of lobbying from countries including the UK, there are concerns the commission will not set out binding targets for countries to increase the percentage of energy they source from renewables.
The commission may also fail to set new targets for cleaning up transport fuel used in the EU - effectively opening the door for polluting "tar sands" produced in Canada to enter the bloc.
It is also likely to publish recommendations for developing shale gas projects in member states, rather than drawing up new EU-wide regulations on fracking.
The UK opposes a renewables target for 2030, arguing it would stop countries using the most cost-effective ways of cutting emissions, which could include non-renewable technology such as nuclear power and measures to cut carbon from conventional power stations.
The Government, which has gone "all out" for shale, has also warned against new legislation on fracking which it claims could delay investment.
And the UK has argued against setting new targets for cutting emissions from transport fuels under the fuel quality directive after 2020.
Friends of the Earth's international climate campaigner Asad Rehman said: "Europe's climate leadership will ring hollow if it fails to take bold action against the threat of climate change and the devastating impacts it will have on us all."