Comments were due by Friday at the Bureau of Land Management, which is scaling back the lands it will make available for experimental works.
The Bureau of Land Management has tentatively decided to lease about 460,000 acres of oil shale deposits, down from 2 million acres the Bush administration planned to offer.
Oil-friendly interests are complaining that the BLM is making little land available with too many regulations. Environmental groups say a century's worth of trying to wring oil from rock has never proved economical, and new efforts will only ruin public lands.
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