Can we break the log-jam holding back renewable energy? Tom Heap investigates.
How the Carteret Islands are slowly being submerged by the rising sea.
How arguments about the protection of the Amazon rainforest are playing out in Brazil.
Tom Heap examines the carbon footprint of older people.
Alice Roberts discovers the potential savings available by harnessing the power of sewage.
Will political and vested interests shatter President Obama's plans for a greener future?
The contribution to global CO2 emissions of huge ICT dataprocessing warehouses.
Costing The Earth investigates the range of biomass heating schemes in the UK.
Tom Heap reports on the Antarctic Treaty.
Miriam O'Reilly investigates whether a crash in prices has made recycling a waste of time.