Obama runs wild with Bear Grylls for TV special

US President Barack Obama met with Bear Grylls during his Alaska trip to shoot a special edition of NBCs Running Wild with Bear Grylls on 1 September. Obama sent out a selfie with the British survivalist from the White House Instagram account. The photo was taken near the Exit Glacier in Seward, Alaska where Obama is highlighting the impact of climate change. Sep 2, 2015

Hawaii: Lava flows from erupting Kilauea volcano

A large breakout of lava erupted from a volcano on Hawaiis Big Island on 27 August, and has flowed into the surrounding forest, the US Geological Survey said. It is not expected to pose a threat to surrounding communities. Aug 28, 2015

Piton de la Fournaise Volcano erupts on Reunion Island

The Piton de la Fournaise volcano on the Reunion Island erupted 24 August, prompting tourists and locals to endure the cold night to watch molten lava erupt from the crater. This was the fourth eruption this year for the Piton de la Fournaise, one of the most active volcanos in the world. Aug 25, 2015

Ocean Cleanup samples enormous oceanic rubbish vortex

Researchers returned on 24 August from mapping and sampling a massive swirling cluster of trash floating in the middle of the Pacific Ocean, as the Dutch-borne crew works to refine a clean-up strategy it will roll out globally. Aug 24, 2015

Mexico: Colima Volcano erupts twice spewing ash into air

The Colima Volcano erupted twice on 20 August, spewing ash and smoke more than 3km into the air. Located in the southwestern Mexican state of Colima, the Fire Volcanos first eruption occurred at 8.00am local time and the second at 9.20am. Aug 21, 2015

July was hottest month recorded worldwide

July was the warmest month ever on record worldwide and 2015 has been so far the hottest year, the US National Oceanic and Atmospheric Administration said on 20 August, just over three months to go before world leaders seek to reach a climate agreement in Paris. Aug 21, 2015