“The presence of one or more pollutants in the environment or any combination of them that causes an ecologic unbalance.

Natural - They are not produced by humans ; they come from gases or ashes from volcanic eruptions or wildfires.

Artificial- All those pollutants originated by human activities such as the combustion of fossil fuels , industries , agriculture , household activities , oil spills, nuclear energy and wildfires, among others

Are those generated by the industry such as detergent, oil, solvent and petroleum.

Could be of a visual, hearing or radiative character, as well as garbage.

Are those generated by hospitals, such as blood, organs, viruses or bacteria; as well as protozoan or fungus generated by garbage.

Water is a very important resource for life and the balance of our planet, and is concentrated into three parts, 97% in oceans and seas, 2% in glaciers and 1% as freshwater.

Air pollution is one of the most dangerous since it generates great environmental problems at a global level such as greenhouse effect, climate change and the deterioration of ozone layer

Primary-Chemical substances that add on directly to the air natural, permanent of movable sources and it is present in a dangerous condition

Secondary- Dangerous substances formed in the atmosphere when a primary pollutant reacts with a natural component or with other pollutants, mostly induced by solar radiation.

There are three types of waste that contaminate it:

Treated differently from hazardous waste since it contains pathogenic microorganisms, bacteria and viruses.

World Health Organization consider 70 decibels as a maximum permitted level without occasioning damages to human health.

Considered as all the elements that modifies the visibility in a certain zone or landscape, such as panoramic ads, or excessive illumination, like in huge publicity monitors.

Presented by the invasion of warm waters (30 to 32 Celsius) from Ecuador to Peruvian and Chilean shores, where the normal water temperatures are low (13 to 15 Celsius).

Each time an El Niño phenomenon is finished, another period starts, called La Niña.