News roundup: Green green grass, power station emissions soar and more

A £1m study hopes to use grass to produce "green" chemicals for plastic and cosmetics [BBC]

Despite better understanding of climate change, UK power station emissions soar [Guardian]

Sienna Miller and a group of Bollywood stars have launched a climate change campaign [Times]

First global study to identify populations most at risk from rising sea levels and cyclones linked to climate change to be published next month [Science Daily]