WASHINGTON — The Trump administration on Monday announced that it would change the way the Endangered Species Act is applied, significantly weakening the nation’s bedrock conservation law and making it harder to protect wildlife from the multiple threats posed by climate change.

The new rules would make it easier to remove a species from the endangered list and weaken protections for threatened species , the classification one step below endangered. And, for the first time, regulators would be allowed to conduct economic assessments — for instance, estimating lost revenue from a prohibition on logging in a critical habitat — when deciding whether a species warrants protection.

Critically, the changes would also make it more difficult for regulators to factor in the effects of climate change on wildlife when making those decisions because those threats tend to be decades away, not immediate.

Over all, the revised rules appear very likely to clear the way for new mining, oil and gas drilling, and development in areas where protected species live.