On what date did President Obama announce new regulations on power plants to combat climate change?

President Obama announced new regulations on power plants to combat climate change on June 2, 2014. The regulations, known as the Clean Power Plan, aimed to reduce carbon dioxide emissions from power plants by 32 percent below 2005 levels by the year 2030. The plan was a major part of President Obama's efforts to combat climate change and transition to cleaner forms of energy.

The Clean Power Plan faced legal challenges from several states and industry groups, and in 2016 the Supreme Court issued a stay on the regulations pending further review. The Trump administration ultimately repealed the plan in 2019 and replaced it with a less stringent rule.

Despite the repeal of the Clean Power Plan, many states and companies have continued to pursue their own emissions reduction goals and invest in renewable energy. President Biden has also made tackling climate change a top priority of his administration, and has taken steps to reinstate and strengthen environmental regulations.