The EPA is planning to make states clean up the air in national parks — though under the current plan, they wouldn’t be held accountable until 2064. Regulations to be announced by Pres. Clinton, perhaps as early as Earth Day this Thursday, would require states to assess their haze problems, develop cleanup plans by 2008, and then implement them over the next six decades. Enviros are lobbying for a much faster cleanup pace, while power industry executives say the proposed regs are too rigid and would raise electricity bills.