Administration's proposed rules renew environmental, technology debate

SALT LAKE CITY - The Bush administration's push Tuesday to speed up development of oil shale in the Rocky Mountains runs headlong into Colorado and Wyoming leaders, who say the environmental costs are too high and the technology unproven.

The Interior Department unveiled proposed regulations Tuesday for a program to sell oil shale leases on federal lands, similar to the leases sold now for oil and natural gas both on and offshore.