*BIDEN SPEAKS AT EVENT NAMING ENVIRONMENT AND ENERGY NOMINEES
*BIDEN SAYS HE WILL REJOIN THE PARIS CLIMATE ACCORD
*BIDEN CALLS CLIMATE CHANGE 'EXISTENTIAL THREAT OF OUR TIME'
*BIDEN CALLS FOR THE FEDERAL GOVERNMENT TO BUY ELECTRIC VEHICLES
*BIDENS CALLS FOR 1.5 MILLION ENERGY-EFFICIENT HOMES...