The greenhouse gas emissions of biofuels have been under discussion for years. Now studies commissioned by the European Union are putting pressure on biodiesel in particular.
Following a row that lasted several months, solar firms have finally agreed on a concept for voluntary panel recycling. This comes too late, as the EU now wants to use the WEEE Directive to dictate what should happen to old panels.
China remains the largest wind market in the world, but the domestic sector is facing a tough period of consolidation. New regulations aim to improve quality and grid integration.
If Europe is to achieve its renewable energy goals, its power grid will have to grow accordingly. New studies point to a need for expansion on land and at sea. The greatest challenge lies in coordination between governments.
Ecuador's Yasuni-ITT initiative, a pilot project to protect the climate and the rainforest has failed miserably. How might international agreements on environmental protection be achieved in the future?
The Clean Development Mechanism was supposed to ensure sustainable development in emissions trading. But instead, it has turned out to be an escape route for polluters.
The planet keeps getting hotter and hotter. In many regions, people are experiencing climate change at first hand. However, when it comes to the issue of a binding climate agreement, politicians struggle to make progress.
Scientists and companies around the world are working on microbiological processes to make bioethanol out of cellulose. They're also wondering whether butanol may not be even better.
Solar power has played practically no role in India up to now. But that may change soon. The government has introduced an ambitious program to expand the country's solar output to 20 gigawatt (GW) by 2020 and boost the local manufacturing market.
