Wetland protection and research are becoming hotspots. The concept of generalized wetland that is gradually accepted has revolutionized the traditional classification system of the global environment. The primary classification of the ecosystem in the earth's biosphere has changed from ocean and land to ocean, wetland, and land. The only ecosystem in the ecosystem that intersects four circles (atmosphere, hydrosphere, soil circle, lithosphere), is astonishingly close to human survival. Does the above paragraph mainly support the view that the reason why wetland protection and research has become a hot spot? ["Wetlands are vast, revolutionizing ecosystems in the Earth's biosphere.", 'The wetland ecosystem is a system with four intersections of gas, water, soil, and stone.', 'Humans mainly live in wetland ecosystems and have the closest relationship to them.', 'Wetland ecosystems have poor living conditions and are prone to various natural disasters.']