The document discusses various threats to the environment and ways to protect nature. It notes that industrialization has led to greater contradictions between humans and the environment. Issues like pollution, overpopulation in cities, and waste are damaging the environment. Litter and improper waste disposal harm health and spoil natural areas. Factories release dangerous chemicals into the air, water and soil. Unless immediate action is taken to reduce pollution and clean up contaminated sites, more environmental damage and species loss will occur. Everyone must work to maintain clean land, air and water for future generations.