#wanttoknow! – This week’s viewer question was posed by Madeleine Vergara Hernández from Colombia.
A poisonous cloud is hovering over the Chilean coastal town of Quintero, and residents are complaining of respiratory problems, dizziness and vomiting. Yet those responsible are driving economic growth in the country.
Air travel is the fastest-growing source of carbon emissions. But could green tech and optimization mean that one day, we'll be able to hop on a plane with a guilt-free conscience?
In Nigeria's Niger Delta, gas flares are killing crops, polluting water and damaging human health. The Nigerian government has promised to tackle the problem — but new data shows flaring has even gone up.
Molten lava from Hawaii's erupting Kilauea volcano is pouring into ocean water, forming a potentially fatal toxic white cloud. Experts have warned that the eruption could be entering its most dangerous phase yet.
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