london british lawmakers write prime minister theresa may urge challenge u.s. president donald trump view climate change two leaders meet friday trump dismiss climate change hoax vow presidential campaign pull unite state 2015 paris agreement design curb greenhouse gas emissions blame global warm one world large emitters ... approach reduce emissions could determine whether uk people round world experience avoid bad impact climate change letter cross-party environmental audit committee say may set first foreign leader meet new u.s. president friday talk expect focus trade environmental audit committee chair mary creagh say may use opportunity demonstrate britain commitment fight climate change prime minister say afraid challenge new president start tell climate change hoax creagh say scientists warn rise global temperatures must stall stave bad effect climate change include flood droughts rise sea level british lawmakers urge may tackle trump climate change