Canada

Mexico

United States

North America

A map highlights the North American Free Trade Agreement Members such as Canada, U S, and Mexico in green.

Member states of the North American Free Trade Agreement, an organization founded in 1994 to create a trade bloc in North America with Canada, Mexico, and the United States

Countries

World

NAFTA Now

North American Free Trade Agreement (NAFTA) Members

A map shows the p H levels of acid rain in the U.S. States like Ohio and Pennsylvania have the lowest p H levels (4.50 to 4.59 p H, black). States like Arizona and Nevada show the highest p H levels (greater than or equals 5.30 p H, light yellow).

Average acidity of precipitation in the United States. Lower pH values represent greater acidity.

Acid Rain (U.S.)

Geosystems: Intro to Physical Geography

Acid Rain

Anthropogenic Biomes

Areas at Risk of Soil Degradation

Average Annual Precipitation

Biomes

Climate Zones

Global Mean Temperature, January

Global Mean Temperature, July

Global Surface Warming: Worst-Case Projections (NASA)

Insolation

Land Cover

Major Soil Orders

Prevailing Agricultural Practices

World Elevations

Display by:	North American Free Trade Agreement (NAFTA) Members	Acid Rain
	Value	4.70–4.79 pH	4.80–4.89 pH	4.90–4.99 pH	5.00–5.09 pH	5.10–5.19 pH	≥5.30 pH
		1.13%	1.16%	1.51%	1.42%	1.12%	45.8%