After helping prevent extinctions for 50 years, the Endangered Species Act itself may be in peril

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Fifty years after the law took effect, environmental advocates and scientists say it’s as essential as ever. Habitat loss, pollution, climate change and disease are putting an estimated 1 million species worldwide at risk.

Yet the law has become so controversial that Congress hasn’t updated it since 1992 — and some worry it won’t last another half-century.

Conservative administrations and lawmakers have stepped up efforts to weaken it, backed by landowner and industry groups that contend the act s tifles property rights and economic growth. Members of Congress try increasingly to overrule government experts on protecting individual species.

The act is “well-intentioned but entirely outdated ... twisted and morphed by radical litigants into a political firefight rather than an important piece of conservation law,” said Bruce Westerman, an Arkansas Republican and chairman of the House Committee on Natural Resources, who in July announced a group of GOP lawmakers would propose changes.

Environmentalists accuse regulators of slow-walking new listings to appease critics and say Congress provides too little funding to fulfill the act’s mission.

“Its biggest challenge is it’s starving,” said Jamie Rappaport Clark, president of the advocacy group Defenders of Wildlife.