After more than 36 hours of continuous negotiations, delegates at the U.N. climate talks in Warsaw agreed to two last-minute deals that kept alive hopes for staving off climate change. At talks that ended Saturday, delegates agreed to a proposed system for pledging cuts in greenhouse gas emissions.
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Warsaw
A new subway development in Warsaw, Poland, captures the braking energy from its metro cars and stores it to boost another train’s acceleration to the next station.
Regenerative braking for trains is picking up steam from the West Coast of the USA to the East, and also