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Acid rain is a colloquial term that refers to acids and associated compounds in rainfall, cloud water, snow, and airborne

Acid rain is a colloquial term that refers to acids and associated compounds in rainfall, cloud water, snow, and airborne

Aerosols are technically defined as a suspension of solid or liquid particles in a gas. By this standard, cloud droplets

An aerosol is a suspension of solid or liquid particles in a gas. By this standard, cloud droplets are technically

Jean Louis Rodolphe Agassiz (1807–1873), Swiss–American natural scientist, was born in Motier-en-Vuly, Switzerland, and grew up in the

Agenda 21 is the lengthy plan of action (approximately five hundred pages) adopted at the United Nations Conference on Environment

The use of land for the production of food, fiber, and fuel is the principal driver of land use and

The use of land for the production of food, fiber, and fuel is the principal driver of land-use and land-cover

Agriculture, the art, science and business of raising livestock and cultivating soil to produce crops, is totally dependent on genes,

Air is a fundamental natural resource, critical to the very existence of life on Earth. The degradation of air quality

Albedo (derived from the Latin term albus, “white”) is defined as the fraction of incident solar radiation reflected by

Albedo (derived from the Latin word albus, “white”) is the fraction of incident solar radiation reflected by a surface. It

The Amazon River watershed totals 7,350,621 km², of which 4,982,000 km² (67.8%) is in Brazil, 956,751 km

[This case study focuses on the results of Amazonian deforestation, which give rise to the destruction of biodiversity, reduced

Animal agriculture has evolved with the growth of the human population from 4 million people ten thousand years ago to

This entry comprises two articles on natural and anthropogenic environmental changes in Antarctica. The first article focuses on the threats

Since the outset of scientific efforts to understand the natural climatic changes that the Earth has undergone in the past

Anthropogeomorphology is the study of the human role in creating landforms and modifying the operation of geomorphological processes such as

Anthropogeomorphology is the study of the human role in creating landforms and modifying the geomorphological processes such as weathering, erosion,

The Aral Sea was, by area, the world's fourth largest lake in 1960. Though brackish, the lake was populated