How to dim the consequences of global light pollution

Our ancestors could look up and see the Milky Way—our galaxy—as a large band of white light stretching across the sky. Because of light pollution, that's no longer the case. One study estimated that 60% of Europeans and ...

Diesel exhaust may harm the immune system, trigger inflammation

Exposure to diesel exhaust particles triggers higher levels of inflammation, especially during a respiratory infection, according to researchers from the University of North Carolina at Chapel Hill. Researchers found that ...

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Pollution

Pollution is the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms . Pollution can take the form of chemical substances, or energy, such as noise, heat, or light energy. Pollutants, the elements of pollution, can be foreign substances or energies, or naturally occurring; when naturally occurring, they are considered contaminants when they exceed natural levels. Pollution is often classed as point source or nonpoint source pollution. The Blacksmith Institute issues annually a list of the world's worst polluted places. In the 2007 issues the ten top nominees are located in Azerbaijan, China, India, Peru, Russia, Ukraine and Zambia.

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