China's smog problem explained

A thick haze has this week smothered Beijing and surrounding areas, with tens of millions of people in northern China under severe pollution warnings.

'It's horrible': Spain sweats through day 2 of heatwave

Spain issued "extreme" danger alerts over scorching temperatures in three regions Tuesday as firefighters said a blaze that had raged for days in the Canary Islands had almost burnt itself out.

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Mask

A mask is an article normally worn on the face, typically for protection, disguise, performance or entertainment. Masks have been used since antiquity for both ceremonial and practical purposes. They are usually worn on the face, although they may also be positioned for effect elsewhere on the wearer's body, so in parts of Australia giant totem masks cover the body, whilst Inuit women use finger masks during storytelling and dancing.

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