Updated on Wednesday, June 25, 2008, 00:00 IST

San Jose, June 25: Costa Rican coffee farmers are facing threats from climate change but the rising temperatures are also expanding high-altitude regions where the country's most prized beans are grown.

Human emissions of greenhouse gases could cause the earth's surface temperature to rise anywhere between one and six degrees Celsius (1.8 and 10.8 degrees Fahrenheit) over the next 100 years, according to the United Nations, forcing growers of all crops to adapt to new weather conditions.

In Costa Rica, the temperature increases may help transform mountainous land that was once too chilly for delicate coffee trees into prime coffee-planting territory.

The strictly hard-bean Arabica coffee sought by specialty roasters is only found at high altitudes, so the shift could mean more opportunities for a country already known for its quality coffee.

"We can now plant at 2,000 meters (6,562 feet). We didn't plant there before," said Daniel Urena, an agronomist for the Coopedota coffee cooperative, which sells its high-altitude coffee to buyers such as Starbucks Corp.

Urena said the cooperative's coffee plants traditionally have not survived above 1,800 meters (5,906 feet).

Bureau Report