Bonterra Vineyards has added its name to the list of people concerned with global climate change.

The California-n wine company has become a featured partner on the advocacy website StopGlobalWarming.org.

"Bonterra produces wine from organic grapes and is a leader in sustainable business practices," the company said yesterday (16 January). At its winery in Hopland, California, Bonterra uses only renewable energy, including solar, and trucks and tractors run on biodiesel.

"It's only natural that we support responsible environmental dialogue," said Bob Blue, winemaker for Bonterra. "We've had them man march, and now, if our friends will join us, perhaps we'll have them grape march to keep this important conversation moving forward."

The website is recruiting 'virtual marchers' to join a march on Washington D.C. on Earth Day, 2006 on 22 April.