would have averaged 2% higher through 2030 with Obama's emissions-cutting power plan, mainly from the initial costs of adding more solar, wind and natural gas production to the electricity mix.Biden jumped in with his own question, asking Trump why he was axing President Barack Obama's other major climate effort — much tougher mileage standards that would have boosted electric cars.The Obama administration said its move would have cut 6 billion metric tons in greenhouse gases.