On this day, 34 years ago, on September 27, 1991 (August 20, 1991 in the lunar calendar), the World Forest Congress adopted the Paris Declaration. On September 27, 1991, the 10-day 10th World Forest Conference concluded after adopting a "Paris Statement" to protect human wealth and forest resources. The Paris Statement calls on policymakers, international organizations and public opinion around the world to pay attention to development and environmental issues, plant trees, build a green protective layer for the earth, limit the harm of toxic pollutants to forests, adopt long-term economic policies to develop forestry, and provide assistance to developing countries in forestry construction and carry out international cooperation in forest protection, scientific research, and management. During the meeting, representatives of many countries expressed concern about the various damage to forests around the world. They pointed out that poverty, debt, underdevelopment and rapid population growth are the main reasons for indiscriminate logging of forests in developing countries; However, various environmental pollutants such as acid rain and greenhouse effect caused by industrial development in developed countries have caused the disappearance of large numbers of the world's forests. At the meeting, experts held special discussions on issues such as forest protection, forest and ecological resource utilization, and put forward a number of opinions and measures.