Here is a simple concept;
A species reproduces via a breeding pair.
The breeding pair has two kids, population remians stable (ish).
The breeding pair has four kids, population double in one generation (ish).
So bearing that in mind. . . . .
Why is everyone adverse to talk of a "keep at two" policy, and at the same time moaning about new housing development spoiling their view.
More kids = more people = more houses.
If you like to see this issue discussed in UK parliment please sign the official UK Government petition on population:
More Info on Over population.
Population Matters UK