By Timothy Gardner WASHINGTON (Reuters) – Republican U.S. representatives heading to U.N. climate talks in Egypt plan to discuss developing critical minerals used in everything from nuclear energy and electricity transmission to batteries for electric vehicles, the head of the delegation said on Wednesday. “I’m hoping to see a more practical approach to bringing forth the critical minerals that we need in a new energy world,” said Representative John Curtis, the chairman of the Conservative Climate Caucus, a group of lawmakers. Five members of the group, including Representatives Greg Murphy a…