Agence France-Presse: Even if BP manages to quickly cap oil gushing at the bottom of the Gulf of Mexico, the environmental impact from the massive slick will still be “significant,” a senior EPA official said Friday. “There already is going to be a significant environmental impact here, even if it stops leaking now,” Environmental Protection Agency Deputy Administrator Bob Perciasepe told AFP. “Everything we are doing is to try to continue to minimize the amount of environmental damages. But …