By Makini Brice WASHINGTON (Reuters) – President Joe Biden said on Friday he would act on his own to cut climate emissions and urged his fellow Democrats to pass the few elements of their sweeping domestic policy package they can agree on after talks in the Senate collapsed once again. Biden said he would take unspecified steps to reduce climate emissions after Senator Joe Manchin, a lone Democratic holdout, said he would not back tax hikes and emissions-reductions incentives that have stalled in Congress. Biden urged lawmakers to separately pass provisions of the package that Manchin supports…