In a couple of weeks time all eyes will be turning to Rio as the Earth Summit returns to Brazil twenty years after the iconic meeting of 1992. This will be the third and biggest in a series of landmark global gatherings that aims to find a balance between economic growth and environmental protection.

In the run up to the summit, over on Martin Harper's blog, we're looking at the successes and challenges of saving nature around the world and today's spotlight is well and truly on rainforest. Click here to take a look.