“The very future of our state is at stake,” the letter read.

Environmentalists say that the new governor’s actions could hobble the agency just as its work is most needed. The moves come as other right-leaning states are also cutting back on climate goals and even references to climate change. This month, Florida Gov. Ron DeSantis (R) signed a bill erasing most mentions of climate change from state law. DeSantis is also poised to nullify the state’s targets for 100 percent renewable energy by 2050.

Since 2005, when Louisiana was devastated by two hurricanes, the coastal restoration agency has built or revamped over 300 miles of levees that hold back floodwaters, and restored dozens of miles of barrier islands that can absorb the pressure of waves and rising seas. The agency works to shore up these defenses in the face of future, stronger storms and higher seas.

Its work is critical, experts say: Louisiana is losing coastline at a dramatic rate. In the past century, the state has lost over 2,000 square miles of land; it could lose 2,000 more in the next 50 years, scientists predict. As sea level rise has accelerated, so has the loss of land. Wetlands are “drowning” in many areas of the state — covered by sea level rise faster than they can grow. In the coming decades, scientists say, the state could lose up to 75 percent of its natural buffer against hurricanes and storms…