By connecting clusters of small-scale generators such as solar farms, wind turbines and biogas facilities, virtual power stations have the capacity equal to a small nuclear plant.
Japan's largest nuclear power plant has been declared safe by regulators, prompting renewed concerns from critics that operator TEPCO has not learned the lessons of the 2011 Fukushima disaster. Julian Ryall reports.
Millions of households and businesses in rural Bangladesh don't have to access to the electricity grid. One startup wants to light up villages by enabling those with solar panels to share energy with their neighbors.
Dirty air resulted in the premature deaths of more than 500,000 people in the European Union in 2014, the European Environment Agency reports. Pollution needs to be reduced, agency heads and environmentalists agree.
Germany's Greens have said the 20 dirtiest coal-fired power plants must be shut if they form coalition with Merkel. Polls indicate the Greens could be part of a three party coalition.
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