The Stockholm Agreement, also known as the Convention on Long-Range Transboundary Air Pollution, is an international treaty that was signed in 1979 in Stockholm, Sweden. The purpose of the agreement is to address the issue of air pollution and its effects on human health and the environment.

A total of 34 countries signed the Stockholm Agreement, including the United States, Canada, the United Kingdom, France, Germany, and Japan. The agreement was later ratified by these countries, as well as many others, and went into effect in 1983.

The Stockholm Agreement is a landmark environmental treaty that served as a model for many other international agreements addressing air pollution, climate change, and other environmental issues. It established a framework for cooperation among nations to reduce emissions of pollutants, including sulfur dioxide, nitrogen oxides, and particulate matter.

The agreement also established a system for monitoring and reporting on the levels of these pollutants in the air, and for setting goals for reducing emissions over time. Countries that signed the agreement committed to taking action to reduce their emissions, including developing and implementing national air pollution control strategies.

The Stockholm Agreement is an important example of the international cooperation that is necessary to address global environmental problems. It demonstrates that countries can work together to protect human health and the environment, and that such cooperation can lead to meaningful and lasting change.

In conclusion, the Stockholm Agreement was signed by 34 countries in 1979, including the United States, Canada, the United Kingdom, France, Germany, and Japan. It established a framework for international cooperation to address air pollution and its effects on human health and the environment, and served as a model for many other environmental agreements. The Stockholm Agreement is an important reminder of the power of international cooperation to solve global environmental problems.