statewide carbon pollution by 2030. In 2017, Hogan vetoed legislation passed by the Maryland General Assembly to increase the use of renewable energy by setting a renewable portfolio standard to require that 25% of the state's electricity come from renewable sources (such as solar, wind, and hydroelectricity) by 2020. Hogan and the Maryland Republican Party led an unsuccessful campaign to sustain the veto, but the Democratic-controlled General Assembly overrode it on party lines. In April 2022, Hogan refused to veto or sign a bill that accelerated these efforts, allowing the bill to become law without his signature. In April 2017, Hogan signed a law banning hydraulic fracturing in Maryland. But he supported pipelines in Maryland that transport natural gas obtained by hydraulic fracturing in other states, including the Eastern Shore Pipeline. In June 2017, Hogan maintained support for the Paris Agreement and opposed the United States withdrawal from the Paris Agreement. In January 2018, he said Maryland would join the United States Climate Alliance formed by California, New York, and Washington. In 2016, Hogan vetoed the Baltimore Red Line light rail project, which had been awarded federal money, and shifted these funds into road construction. With transportation responsible for 30% of U.S. emissions, Hogan has not articulated a vision of how the U.S. could achieve the Paris Agreement's goals without changes in transportation investments. Critics have said that his funding of roads is reflective of his business interests or racial politics rather than his position on environmental regulation. In November 2021, the Maryland League of Conservation Voters deemed Hogan's environmental leadership inconsistent in its annual legislative scorecard. In March 2022, Hogan threatened to veto the Climate Solutions Now Act, an omnibus bill to reduce greenhouse gas emissions by 60 percent by 2031, calling the climate bill a "reckless and controversial energy tax", even though the bill contained no tax increases. The bill passed and became law without his signature. Gun control In October 2018, a law tightening gun control regulations that Hogan signed went into effect. The law banned bump stocks and gun ownership by convicted domestic abusers. Hogan was endorsed by the National Rifle Association (NRA) in 2014, but in July 2018, he said he would decline an endorsement and funds from the NRA if they were offered. In September 2018, the NRA downgraded its rating of Hogan to "C" and declined to endorse him. On May 24, 2019,