The Paris Agreement is a landmark accord that was ratified by 195 countries within the United Nations Framework Convention on Climate Change (UNFCCC) in December 2015. The agreement aims to limit the global temperature increase to well below 2 degrees Celsius above pre-industrial levels, and to pursue efforts to limit the increase to 1.5 degrees Celsius. This was achieved through an ambitious goal of reducing greenhouse gas emissions from human activities to net-zero levels in the second half of the century.

One of the key aspects of the Paris Agreement is its emphasis on the need for countries to regularly report and review their progress towards achieving their climate goals. These reports, submitted every five years, are meant to showcase each country`s efforts and identify areas where more work needs to be done.

The first round of these reports, known as Nationally Determined Contributions (NDCs), were submitted in 2015 and 2016. However, since then, the United States (one of the largest emitters of greenhouse gases globally) has announced its withdrawal from the agreement, creating uncertainty over the future of the agreement.

Despite this, the Paris Agreement continues to move ahead. In December 2018, the UNFCCC held a critical climate summit in Poland, where delegates agreed on a detailed rulebook to guide the implementation of the Paris Agreement. This rulebook outlined the specifics of how countries should report their progress towards achieving their climate goals, including transparency, accountability, and ambition.

The next round of NDCs are due in 2020, and the hope is that countries will come forward with more ambitious plans for reducing their emissions, as well as increasing support for other countries that are particularly vulnerable to the effects of climate change.

Another important milestone in the Paris Agreement timetable is the global stocktake in 2023. This will be a comprehensive review of where countries stand in terms of their progress towards meeting the goals of the agreement. It will also be an opportunity for countries to submit more ambitious plans for reducing their emissions.

In conclusion, the Paris Agreement is a critical international effort to limit global warming and address the impacts of climate change. It sets out specific targets and guidelines for countries to follow in reducing their greenhouse gas emissions and increasing their support for climate action. Although there are still challenges ahead, the framework provided by the agreement provides a roadmap for a more sustainable future for all countries around the world.