Final answer:
The Paris Agreement is a global treaty within the UNFCCC framework, aimed at combating climate change by limiting global warming to below 2°C, with a further aspiration to limit it to 1.5°C. It marks a concerted effort by 196 entities, including the top emitters of greenhouse gases, to undertake significant CO₂ emissions reduction.
Step-by-step explanation:
The Paris Agreement is a global treaty, within the United Nations Framework Convention on Climate Change (UNFCCC), aiming to limit global warming to well below 2°C above pre-industrial levels, with an aspirational goal of 1.5°C. Adopted in 2015, it includes contributions from signatory countries to reduce greenhouse gas emissions and mitigate the effects of climate change. The Agreement encourages a balance between anthropogenic emissions by sources and removals by sinks of greenhouse gases in the second half of the century.
As part of the Paris Agreement, 196 entities, including China and the United States, the two largest greenhouse gas emitters, agreed to take significant action to reduce CO₂ emissions. The U.S. initially contributed with the Clean Power Plan, although plans were made to withdraw by the Trump Administration in 2017. This withdrawal was later reversed by President Biden on his first day in office, reaffirming the U.S. commitment to the Paris Agreement.