A chemical, biological, or physical change in the environment that causes harm to organisms is called , which can occur in air, water, or land.

The term you're looking for is "pollution." Pollution refers to the introduction of harmful substances or contaminants into the natural environment, resulting in adverse effects on living organisms and ecosystems. This can occur in various forms, including air pollution (e.g., emissions from vehicles), water pollution (e.g., chemicals dumped into rivers and lakes), and land pollution (e.g., waste disposal and soil degradation). The impacts of pollution can be severe, leading to health issues in humans and wildlife, loss of biodiversity, and damage to ecosystems. Addressing pollution is a critical challenge for environmental science and public health, requiring concerted efforts in regulation, technology, and community awareness.