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More than one billion people do not have access to electricity. What will it take to get them connected?
Pristine Antarctic fjords contain similar levels of microplastics to open oceans near big civilisations
Feeling sleepy in the office? This Japanese technology detects tired workers and blasts cold air into the room
The burning Arctic, how pollution causes diabetes, the informality trap and other top stories of the week
The secret to football success, starting work at 40, global military spending and other top stories of the week