Introduction of biological, chemical or physical to the half outside. Any undesirable change the natural composition of a medium.
Lands
Wetlands (marshes, mangroves) are among the ecosystems that generate more life. Hence its huge ecological importance and danger of disappearing. The first overall assessment reveals that more than 1,200 million hectares of land (equivalent to the combined area of China and India) have suffered serious degradation in the last forty-five years, according to data from the World Resources Institute.
Waters
Contaminate water is life itself. The entire life cycle, reproduction and food of man, animals and the sea is profoundly affected. At present, all the world’s oceans are affected by oil spills. Nearly every year, spilling into the sea 3.5 million barrels.
The Air
Any particles of solid or gaseous material that accumulates in the atmosphere and reaches negative effects for life or the environment is considered polluting. Air pollution can be concluded, is an old problem. A century ago, was caused mainly by smokestacks that testified to the rise of the Industrial Revolution. Today, they have diversified sources and effects have expanded.
