The third part of the SDGs (Sustainable Development Goals) series is "Let's protect the richness of the land." It is said that 13 million hectares of forest are lost on the earth every year, and 40,000 species of organisms are extinct every year. However, Japan is full of "wisdom to protect the land" left by our predecessors. The guardian forest in the city built over a hundred years, burning field agriculture that does not destroy the ecosystem, and people who protect endangered species, etc. We will explore ways to maintain the richness of the land while looking at Japan's efforts and the current situation overseas.