( April 15, 2025, 1:21 PM EDT) -- DENVER — Environmental advocacy groups have sued the U.S. Bureau of Land Management (BLM) challenging the agency’s denial of three petitions in which the groups asked the BLM to acknowledge that 22 federal oil and gas leases in Colorado have terminated or expired, arguing that the BLM’s denial keeps the lands subject to the threat of oil and gas drilling and prevents BLM and the U.S. Forest Service from managing them for other uses such as conservation, wildlife habitat and recreation....