Germany is very environmentally friendly country. The cost of wastewater treatment in Germany is much higher than the cost of building water supply facilities. Air monitoring stations are located throughout Germany, and air quality is automatically monitored 24 hours a day. As the sales of unleaded gasoline has accounted for 95%, and the use of "three-way adjustable catalytic converter technology", Germany's forests cover an area of about one-third of the national territory, a large area of forests and green space can make the air purification, trees and green space will be the car exhaust gas absorption, very effective protection of the natural environment. 1995, Germany In 1995, Germany enacted the Circular Economy Act, transforming the entire consumption and production into a unified circular economy system. In Germany, an average person produces 351 kilograms of garbage per year, and the country produces 26 million tons of garbage per year. The main disposal methods are 79% landfill, 17% incineration, 1% compression and 3% by other means. The Ruhr-University Bochum has created its own series of strong and unique majors, and these strong majors for studying in Germany have an important position in the country in terms of teaching and research. In the natural sciences, environmental research is a recognized strength. More than 200 research projects are currently underway in environmental studies. Oldenburg University is characterized by openness to explore new paths, environmental research and energy research has become a multidisciplinary research focus.