Some people are unaware of the UN's growing influence on world politics, e,g, Agenda 21, which aims for 'sustainablity' from the local level up to the global level. Whether you think it's good or bad, let's put Agenda 21 in the spotlight and make it subject to the democratic process.
Our government puts very little (if any) emphasis on sustainability & other general environmental issues. Our current government has a terrible record here (Owen Paterson?). We rely on the EU & UN to keep pushing this agenda, even though some policies may be unpopular (because we're so used to doing as we please regardless of environmental consequences. I say we let them lead it.