By Duncan Graham-Rowe, New Scientist
Contrary to popular belief, hydroelectric power can seriously damage the climate. Proposed changes to the way countries' climate budgets are calculated aim to take greenhouse gas emissions from hydropower reservoirs into account, but some experts worry that they will not go far enough.
By Duncan Graham-Rowe, New Scientist / Jrnl of Renewable Energy
Methane generated by rotting rubbish in landfill dumps could make a far greater contribution to the world's energy supply. A new way of harvesting the gas should mean that many landfill dumps that till now were thought to be too small to produce usable amounts of the gas will be able to provide a viable supply.