The latest stories from the Science & Environment section of the BBC News web site.
The system of 78 mobile barriers has taken years to construct and its design goes back to the 1980s.
The US space agency's next rover is placed atop of the rocket that will send it to the Red Planet.
The European mammals will restore a rich habitat for local wildlife, conservationists say.
MPs warn some regions will run out of water within the next 20 years unless "urgent action" is taken.
The majority of emissions cuts from electric cars will be wiped out by new road-building.
As Britain eases out of its Covid-19 lockdown, nitrogen vehicle emissions look to be going back up.
The UN Secretary-General tells a meeting that it is "vital" the world moves towards clean energy.
A future software update could activate full "level-five" autonomy in cars, the Tesla founder says.
An all-electric construction vehicle from the Staffordshire firm wins this year's MacRobert Award.
A third of all the lemur species on Earth are "one step from extinction".
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