Barack Obama optimistic of reaching climate change deal at Paris summit

But US president warns there is still ‘a lot of work to do’ at UN climate summit which he said will send signal to businesses to go ‘all in on renewable power

US president Barack Obama said on Wednesday he was optimistic an elusive deal to contain global warming could be forged at an upcoming crunch summit in Paris , and insisted an ambitious deal would boost a flagging world economy.

In a speech to an Asia-Pacific business conference in the Philippines, Obama said there was still a “lot of work to do” to ensure success at the United Nations summit.

“Nevertheless, I’m optimistic that we can get an outcome that we’re all proud of, because we understand what’s at stake,” Obama said.

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