Obama lays out climate action plan
25 June 2013 Last updated at 22:48 BST
US President Barack Obama has laid out a package of measures aimed at curbing climate change, including limits on emissions from power plants.
He also unveiled plans for an expansion of renewable energy projects, improved flood resilience and calls for an international climate deal.
Administration officials had earlier rejected the idea of a "carbon tax".
President Obama pledged in his inaugural address in January to act on climate change in his second term.
Paul Adams reports.