The United States has rejoined the Paris Agreement, a global treaty on climate change negotiated by 196 countries in 2015. This decision marked a significant shift in the country`s approach to environmental policy and has raised hopes for a more sustainable future.

The Paris Agreement aims to limit global warming to well below 2 degrees Celsius above pre-industrial levels, with the ultimate goal of limiting the increase to 1.5 degrees Celsius. This requires countries to set and achieve ambitious and transparent targets for reducing greenhouse gas emissions.

The US was one of the original signatories of the Paris Agreement, but former President Donald Trump withdrew the country from the pact in 2017, citing economic concerns. His decision was met with widespread criticism, as the US is one of the world`s largest emitters of greenhouse gases.

Joe Biden made rejoining the Paris Agreement a top priority for his administration, and signed an executive order to that effect on his first day in office. This move was hailed as a significant step towards global climate action, and a sign of the US`s renewed commitment to fighting climate change.

Rejoining the Paris Agreement will require the US to submit a new nationally determined contribution (NDC), outlining its targets for reducing greenhouse gas emissions. The country is expected to announce its new NDC in the coming months, and many are hoping for ambitious and comprehensive targets.

The US`s return to the Paris Agreement has also sparked renewed optimism in the international community. The US is a major economic and political power, and its active participation in the treaty could help encourage other countries to step up their climate efforts.

However, rejoining the Paris Agreement is just the first step in a long journey towards a sustainable future. The world is still far from meeting the ambitious targets set out in the treaty, and significant action will be needed from all countries if we are to avoid the worst impacts of climate change.

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