Planet-heating pollution from the U.S. oil, gas, and petrochemical industries could rise about 30% by 2025 compared with 2018 because of additional drilling and 157 new or expanded projects “fueled by the fracking boom,” an environmental watchdog group warned Wednesday.

That estimated emissions increase is equal to “as much greenhouse gas pollution as 50 new coal-fired power plants,” the U.S.-based Environmental Integrity Project (EIP) explained in a statement announcing the new analysis.

The EIP report—titledGreenhouse Gases from Oil, Gas, and Petrochemical Production (pdf)—details recent and potential future emissions from U.S. petroleum and natural gas systems, chemical manufacturing, and oil refineries based on data reported to the Environmental Protection Agency, fossil fuel production projections from the Department of Energy, and permits that companies are seeking or have acquired.

“Facilities in these sectors reported emitting 764 million tons of greenhouse gases (carbon dioxide equivalent tons) in 2018, an eight percent increase since 2016,” the report says. “Expected growth in oil and gas production and large new and expanded oil, gas, and chemical plants have the potential to add up to 227 million additional tons of greenhouse gases by 2025.”

“That could bring total emissions to nearly one billion tons, equivalent to the greenhouse gas output from more than 218 large coal-fired power plants operating around the clock at full capacity,” the report continues, noting that the estimates “likely understate emissions growth from the oil, gas, and petrochemical sectors.”

Aided by both the Obama and Trump administrations, the expansion of the oil, gas, and petrochemical industries in the United States continues despite repeated and increasingly urgent warnings from experts that the U.S. fracking boom is threathening ecosystems and making people sick.

Scientists have called for all countries—but particularly the world’s wealthiest—to rapidly phase out fossil fuels in favor of 100% renewable energy to prevent the worst impacts of the global climate emergency.