emissão

Emissão refers to the act of emitting or giving off something, commonly used in scientific and environmental contexts. In physics, it describes the process by which energy or particles are released from an atom, molecule, or object. This can occur in various forms, such as light emission, where an object emits photons, or particle emission, like the release of electrons from a heated surface.

In environmental science, emissão most often pertains to the release of substances into the atmosphere. This includes greenhouse gases like carbon dioxide and methane, which contribute to climate change, and pollutants such as sulfur dioxide and nitrogen oxides, which can cause air pollution and acid rain. Industrial processes, vehicle exhaust, and natural phenomena like volcanic eruptions are all sources of atmospheric emissões.

The measurement and regulation of emissões are crucial for environmental protection. Monitoring systems track the levels of various substances released into the air, water, and soil. International agreements and national policies aim to reduce harmful emissões by promoting cleaner technologies, energy efficiency, and the use of renewable resources. Understanding and controlling emissões is a key aspect of sustainable development and safeguarding public health.