Andorra

SITUATED IN THE Pyrenees Mountains along the French-Spanish border, Andorra is approximately 180 sq. mi. (470 sq. km.), or the size of New Orleans, Louisiana. The population (est. 80,000) inhabits a region with a cool, temperate climate, amid mountainous terrain. Its economic revenues come from tourism and regional agricultural specialization, both industries with links to climate change. With nearly 12 million visitors per year, tourism comprises over 80 percent of the country's Gross Domestic Product (GDP).

Roadways are limited and inadequate, making stagnant traffic commonplace. Pollution swells during the peak winter and summer tourist seasons, reducing air quality and concentrating greenhouse gases in the valleys. These conditions are exacerbated by high carbon dioxide emissions from low-grade coal-burning power plants in Andorra and northern Spain.

The stronghold of ...