Albedo

The proportions of solar radiation reflected by a surface or object, expressed in percentage. Snow-covered surfaces have high albedo level; ground (soil) albedo can be high or low; vegetation-covered surfaces and oceans have low albedo level. The Earth’s albedo varies mainly due to the different levels of clouds, snow, ice, vegetation, and changes in the earth’s surface.

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Greenhouse effect

Greenhouse effect

It is the way that the Earth has to maintain a constant temperature conducive to life. It is a natural process that provides the necessary temperature for the establishment and sustenance of life on Earth and which is only possible through greenhouse gases. These...

ARPA

ARPA

Brazilian Portuguese acronym for Programa Áreas Protegidas da Amazônia (ARPA), which means Amazon Region Protected Areas Program. The program was launched in 2002 by Federal Decree #4,326 and went into operation in 2003. The ARPA program aims to protect significant...