NEW YORK (Reuters) - U.S. President-elect Donald Trump on Monday met with former Vice President Al Gore, an environmental activist who has devoted years to fighting climate change, Gore told reporters. “I had a lengthy and very productive session with the president-elect,” said Gore, who met earlier with Trump’s daughter, Ivanka Trump, but said he had spent the bulk of his time with Trump. “It was a sincere search for areas of common ground. ... I found it an extremely interesting conversation and, to be continued.” 