The UN weather agency warned that rapid cuts to greenhouse gases are needed to avoid 'dangerous temperature increases'.
Scientists warn time is running out to save ecosystem as survey shows reef has been hit by mass bleaching for a second year in a row.
ITV News has been to see how residents in Longyearbyen, midway between Norway and the North Pole, are living with a new danger - avalanches.
The world has entered a new era of "climate change reality", with carbon dioxide levels in the atmosphere reaching a new average high.
Ice sheets covering Greenland and Antarctica are melting three times faster today than they were in the 1990's, according to scientists.