Fireflies looking for a mate flash through the summer evening in many parts of the world. But the light has nothing to do with romance. It's a biochemical reaction that causes a signal in the fireflies' glow cells.
On this week's eco@africa, we check out a host of renewable and energy-efficient projects, from charging mobile phones with solar energy in Kenya to making green biodiesel fuel out of 'fatbergs.'
Chemistry postgrad Dayne Swearer talks about how he and his team are using light in their search for carbon-free fuels, a year after meeting DW at the Lindau Nobel Laureate Meetings. They could be onto something big.
Whoever takes a swim along Puerto Rico's shores at night will witness a special show. The water starts to glow in a bright blue and green. The effect is called bioluminescence - it's our natural phenomenon of the week.
The protest over a scrap of ancient forest in Germany is about much more than a few scraggly tree huggers. It's about the future of energy — and protection of the climate around the world, says DW's Sonya Diehn.
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