Square kilometre

Iceberg A68a is heading straight towards an Antarctic island teeming with wildlife, including millions of birds and seals.
The state is currently in the grip of a brutal heat wave.
Fires broke out on Saddleworth Moor, West Yorkshire, after the hottest winter day on record. Temperatures hit 21.2 degrees celsius in Kew Gardens, south-west London. The West Yorkshire fire and rescue service said it had up to 40 firefighters fighting the blaze on Tuesday night as an area of around 1.5 square kilometres was burning.
This will contribute to global sea level rise.
This will contribute to global sea level rise.