Hong Kong light pollution 'one of world's worst'

Hong Kong is one of the world's worst cities for light pollution with night skies around 1,000 times brighter than globally accepted levels, researchers said Wednesday ahead of this year's Earth Hour event.

Investigating the wildlife market on the dark web

An Australian research team investigating the trade in wild animals and plants on the dark web scanned about 2 million ads over five years and found nearly 3,500 were for wildlife. In all, over 150 species were for sale, ...

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