The changes will make it harder to consider the effects of climate change on wildlife when deciding whether a given species warrants protection. They would most likely shrink critical habitats and, for the first time, would allow economic assessments to be conducted when making determinations. The rules also make it easier to remove a species from the endangered species list and weaken protections for threatened species, a designation that means they are at risk of becoming endangered. Overall, the new rules would very likely clear the way for new mining, oil and gas drilling, and development in areas where protected species live.