In this edition of Earthbeat:
 
Solar Fuel - how to use the sun's energy, harnessed in solar panels, to create fuel. Professor Nathan Lane from Caltech in the US explains that nature has been doing it for millions of years - it's called photosynthesis. Now, scientists are on the verge of catching up.

 
A tale of two cities: Mumbai traffic is a BIG problem. A 'No Honking' campaign aims to improve life for the residents. Meanwhile in Amsterdam. Saumava Mitra, himself from India, reports on the shocking contrast to be found, and speaks to planners about the policy to keep cars away.
 
Thijs Westerbeek gets inside an incinerator to see the new green way they deal with the ash produced from burning household waste. There's gold in them there ashes, if only you know how to separate them.