Bristol 'UK green capital' would plan to sustain the total amount of open, green space not flog off millions of square metres

Great comment on loss of Bristol's green spaces by Bluebaldee on the Bristol Blogger site - I agree with every word. The figures he quotes in this passage are very striking:

Bristolians are lucky enough to enjoy 38 square meters per capita of green space. The Bristol Quantity Standard proposes that Bristolians could get by with 27.8 sq m of green space - which allows a collossal 10 sq m per capita to be disposed of. My maths makes this: Population 400,000 x 10 sq m = 4 million sq m of land that could be sold for development.

I remember running wild in ‘low quality’ green space eg where Callington Rd and the Brislington Tesco now is, when I was a kid. There are a few other places within a few miles of me that were open/green but are now built over.

It seems that the council does not see sustaining the total amount of open, green space available as one key indicator of progress towards their ambition of being the ‘UK’s green capital’. So what does this ambition mean??