Green walls and edible gardens

Two inspiring photos - the first is a green wall in Westminster (Palace Street). It provides insulation, cooling, biodiversity value and space for food growing. This is where we in London will get most of our new green space - by growing vertically. I'm trying to persuade our Housing Dept to green one of our estates like this.

Below is an project by artist Fritz Haeg. He turned some perfectly manicured lawns in the US suburbs into mini-farms and watched the reaction of neighbours. "What? You can get food from a garden?! I thought food was something that came wrapped in plastic that you had to pick up in your car from the supermarket!"

In the words of John F Kennedy: “We need men who can dream of things that never were.”