Environmental agents refer to any natural or human-made factors that can have an impact on the environment, ecosystems and living organisms. These agents include pollutants such as chemical waste, heavy metals, pesticides, radiation, noise, heat, light, and other forms of energy. They also encompass physical agents like climate change, deforestation, land use changes, and habitat destruction. Environmental agents can have both direct and indirect effects on the environment, ecosystems, and living organisms, leading to various consequences such as air pollution, water pollution, soil degradation, loss of biodiversity, climate change, and other environmental problems.