Global climate change and pollution from the use of fossil fuels killed nearly 5 million people around the world in 2010, according to a report released earlier this year by climate change advocacy group DARA. By 2030, this figure will rise to nearly 6 million deaths, the group’s second annual climate vulnerability monitor estimates. Total global costs, which were estimated at more than $600 billion in 2010, are expected to rise to $4.35 trillion by 2030.

A new analysis of temperature records indicates that the Western Antarctic Ice Sheet is warming nearly twice as fast as previously thought.

US researchers say they found the first evidence of warming during the southern hemisphere's summer months.

They are worried that the increased melting of ice as a result of warmer temperatures could contribute to sea-level rise.

The study has been published in the journal Nature Geoscience.