I'm on a rooftop in Vienna. It's a warm day but around me students work and chat in comfort, shaded by solar panels amid lots of plants.

Despite their long list of possible benefits, experts acknowledge their take-up in Australia has generally been slow, and much slower than many comparable cities around the world.

Maintaining bee colonies in man-made beehives is an awe-inspiring idea, but is it worth the time and effort?

A tomato crop is not a long range prospect, raising the promise of adding to Chennai’s supply through gardens and rooftop producers.

If you live in a busy urban setting, having easy access to gardens and green space can be lacking.