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.
Puerto Rico is still picking up the pieces after Hurricane Maria. Solar power has helped some get back on their feet, but as hurricane season comes round again many fear their island just isn't prepared.
Fashion firms are tapping into growing public outrage at plastic pollution by offering snazzy garments made from old water bottles and other waste. But will it catch on — and can it make a difference?
Water pollution, deforestation and wasted energy are problems all over the world. African students are working to solve them, and they're exchanging ideas with Germany to do it.
Methane hydrate buried below permafrost and the ocean floor could meet the world’s energy needs for 100 years – but would extracting it be catastrophic for the climate?
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