The document discusses the relationship between the environment and human health. It states that a polluted environment poses serious threats to human existence, as environmental degradation from factors like pollution, overpopulation, urbanization, and depletion of natural resources negatively impact human health. It provides examples of different types of pollution - air, water, soil - and how they can increase diseases and health issues in humans. The conclusion emphasizes that sustainable development which considers the relationship between humans and nature is needed to protect human life and health.