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A BBC team visited the site and saw soot, dying vegetation and polluted waterways around.

Back at the White House, President Donald Trump insisted the US needed Greenland to guarantee "peace of the entire world" and that its waterways had "Chinese and Russian ships all over the place".

Canada and Greenland, both early targets of interest for the administration, occupy key Arctic waterways that are being contested by other global powers, like Russia and China.

At a different cluster of makeshift plants in Wada, just outside Mumbai, a team from BBC Indian Languages saw soot, dying vegetation and polluted waterways around the sites.

“It’s about protecting our water supply, and it’s a common-sense measure that simply restores the protections that our waterways have always enjoyed since 1948.”