Respuestas
Respuesta:
Pollution is the introduction of substances or other physical elements into a medium that causes it to be unsafe or unfit for use. The environment can be an ecosystem, a physical environment or a living being. The contaminant can be a chemical, energy (such as sound, heat, light or radioactivity). It is always a negative alteration of the natural state of the environment, and in general, it is generated as a consequence of human activity being considered a form of environmental impact.
Pollution can be classified according to the type of source it comes from, or by the form of pollutant it emits or the medium it contaminates. There are many pollutants including chemical substances (such as pesticides, cyanide, herbicides and others.), Urban waste, oil, or ionizing radiation. All of these can cause diseases, damage to ecosystems or the environment. In addition there are many gaseous pollutants that play an important role in different atmospheric phenomena, such as the generation of acid rain, the weakening of the ozone layer, and climate change.
There are many ways to combat pollution, and international legislation that regulates pollutant emissions from countries that adhere to these policies. Pollution is generally linked to economic, business and social development. Currently, many international organizations such as the UN place sustainable development as one of the ways to protect the environment for current and future generations.