Which treaty is specifically aimed at reducing greenhouse gas emissions?

The treaty specifically aimed at reducing greenhouse gas emissions is The Paris Agreement. This agreement, which was adopted in 2015, represents a global effort to combat climate change by limiting global warming to well below 2 degrees Celsius above pre-industrial levels, while pursuing efforts to limit the temperature increase to 1.5 degrees Celsius. The Paris Agreement establishes commitments from all countries to set and achieve their own nationally determined contributions (NDCs), which are intended to reduce greenhouse gas emissions and adapt to the impacts of climate change.

While the Kyoto Protocol was the first treaty to set legally binding emissions reduction targets for developed countries, it mainly focused on specific developed nations rather than providing a universal framework for all countries. The Clean Air Act is a U.S. law aimed at regulating air emissions from stationary and mobile sources and is not specifically focused on global greenhouse gas reductions. The Montreal Protocol addresses substances that deplete the ozone layer rather than greenhouse gases linked to climate change.