Explanation:

Joe Biden assumed office as President of the United States on January 20, 2021, and among the first orders he signed was one to restore America’s participation in the United Nations Paris Agreement on climate change.

• His decision on America’s return will take effect on February 19, which would be 107 days after its withdrawal under the Donald Trump administration became formal on November 4, 2020.
• In the past, the U.S., under George W. Bush, had pulled out of the previous pact, the Kyoto Protocol, in 2001.

The withdrawal from the Paris Agreement meant that the U.S. was no longer bound by its national pledge made under the pact: to achieve an economy-wide reduction of its GHG emissions by 26%-28% below the 2005 level in 2025.

• America also stopped its contribution to the UN’s Green Climate Fund, to which it had pledged $3 billion, after transferring an estimated $1 billion.
• He has promised an “enforcement mechanism to achieve net-zero emissions no later than 2050”, including a target no later than the end of his term in 2025, aided by a planned federal investment that will total $1.7 trillion over ten years, besides private investments.
• The plan revolves around 10 million well-paying clean energy jobs with a focus on solar and wind power.
• This year’s UN climate conference in Glasgow will see the new administration engaging UNFCCC member-nations to raise global ambition.

Hence only statement 1st is correct.