I don't know how much of the environment you think needs to be protected from being "destroyed" by the laying of pavement, but a helpful comparison might be to

I don't know how much of the environment you think needs to be protected from being "destroyed" by the laying of pavement, but a helpful comparison might be to look at the figures for England: https://www.bbc.co.uk/news/uk-18623096 https://www.bbc.co.uk/news/uk-18623096 "the proportion of England's landscape which is built on is… 2.27%."