Fracking leaves heavy footprint in Argentina's Patagonia

Pumpjack oil wells peck like giant birds at the ground, plumes of yellow flames flare from gas pipelines, lakes accumulate contaminated waste—Patagonia and its indigenous people are paying a heavy price for Argentina's ...

Q&A: What is China's carbon trading scheme?

China has launched the world's biggest carbon trading system to help lower carbon emissions, but critics and analysts have raised doubts about whether it will have a signficant impact.

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