They're lining up to develop Bristol's Green Belt. And plenty of groups and people in Bristol are lining up to prevent it.
One such initiative is a petition on the No. 10 web site, calling for the biggest threat (the draft Regional Spatial Strategy for the South West) to be withdrawn and to recommit to the protection of the green belt.
It's also worth a look at the 'Save Our Green Spaces' website which has plenty about the various campaigns - and at CPRE Avonside's map showing the extent of the threat around Bristol.