The Social Market Foundation says the government will have to build on the green belt to meet its housing targets.
The Social Market Foundation have produced a study that says at least two thirds of the 3m homes Gordon Brown wants built by 2020 will have to be developed on new land, or on existing green belts - areas set aside to prevent towns and cities colliding through the urban sprawl.
![Greenbelt](https://d2vhdk00tg424t.cloudfront.net/MediaLibrary/s3/ubm-library/web/x/d/o/greenbelt_lead.jpg)
Should the system be overhauled before the government's housing plan hits top gear? Or should the established green belts be left well alone?
1 Readers' comment