Beetle-killed pine trees stand near the Continental Divide in central Colorado April 8, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

Beetle-killed pine trees that have been clear cut are piled up on national forest land outside Grand Lake, Colorado April 8, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

Beetle-killed pine trees that have been clear cut are piled up on national forest land outside Grand Lake, Colorado April 8, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

Beetle-killed pine trees stand with some still living trees near the Continental Divide in central Colorado April 8, 2010. All the trees in this forest will eventually die with Colorado already having 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

A dead adult mountain pine beetle is displayed on a piece of tree bark March 23, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

Beetle-killed pine trees stand near the Continental Divide in central Colorado April 8, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

Beetle-killed pine trees stand near the Continental Divide in central Colorado April 8, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

A casket made from beetle-killed pine trees is laid to rest in the Manitou Springs, Colorado cemetary after a funeral April 2, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles and many uses are being found for the wood. REUTERS/Rick Wilking (UNITED STATES) 

A casket made from beetle-killed pine trees is laid to rest in the Manitou Springs, Colorado cemetery after a funeral April 2, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles and many uses are being found for the wood. REUTERS/Rick Wilking (UNITED STATES) 

Luc Nadeau, owner of Nature's Casket moves a pet casket made from beetle-killed pine next to one for people (L) at his shop in Longmont, Colorado April 5, 2010. The beetle introduces a fungus to the tree that causes the blue stain. Colorado has 3 million acres of forest killed by mountain pine beetles and many uses are being found for the wood including casket making. REUTERS/Rick Wilking (UNITED STATES) 

Luc Nadeau, owner of Nature's Casket holds a piece of beetle-killed pine that he uses to build his products at his shop in Longmont, Colorado April 5, 2010. The beetle introduces a fungus to the tree that causes the blue stain. Colorado has 3 million acres of forest killed by mountain pine beetles and many uses are being found for the wood including casket making. REUTERS/Rick Wilking (UNITED STATES) 

Luc Nadeau, owner of Nature's Casket stands in one of his products made from beetle-killed pine at his shop in Longmont, Colorado April 5, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles and many uses are being found for the wood including casket making. REUTERS/Rick Wilking (UNITED STATES) 

Luc Nadeau, owner of Nature's Casket fits the lid onto one of his caskets made from beetle-killed pine at his shop in Longmont, Colorado April 5, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles and many uses are being found for the wood including casket making. REUTERS/Rick Wilking (UNITED STATES) 

A truck load of fence posts made from beetle-killed pine trees moves onto the highway near the Winter Park ski area (background) in Winter Park, Colorado April 6, 2010. Colorado has 3 million acres of forest killed by a tiny bug called the mountain pine beetle. When the beetle crawls under the bark to feed on the tree it brings with it a fungus that kills the tree. A byproduct of the fungus is a distinctive blue stain that streaks the wood. Different businesses are trying to come up with ways to use the all the dead trees - the stained wood is prized for its unique color for paneling and flooring. REUTERS/Rick Wilking (UNITED STATES) 

Luc Nadeau, owner of Nature's Casket lays a cross onto one of his caskets made from beetle-killed pine at his shop in Longmont, Colorado April 5, 2010. Colorado has 3 million acres of forest killed by a tiny bug called the mountain pine beetle. When the beetle crawls under the bark to feed on the tree it brings with it a fungus that kills the tree. A byproduct of the fungus is a distinctive blue stain that streaks the wood. Different businesses are trying to come up with ways to use the all the dead trees - the stained wood is prized for its unique color for paneling and flooring. REUTERS/Rick Wilking (UNITED STATES) 

A stack of beetle-killed pine trees at the Confluence Energy wood pellet plant in Kremmling, Colorado April 6, 2010. The plant, the biggest pellet plant in the U.S. west of the Mississippi makes pellets for home heating from the trees. Colorado has 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

Wood pellets made from beetle-killed pine trees at shown at the Confluence Energy wood pellet plant in Kremmling, Colorado April 6, 2010. The plant, the biggest pellet plant in the U.S. west of the Mississippi makes pellets for home heating from the trees. Colorado has 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

A dead adult mountain pine beetle is displayed on a piece of tree bark April 4, 2010. Colorado has 3 million acres of forest killed by the tiny bug. When the beetle crawls under the bark to feed on the tree it brings with it a fungus that kills the tree. A byproduct of the fungus is a distinctive blue stain that streaks the wood. Different businesses are trying to come up with ways to use the all the dead trees - the stained wood is prized for its unique color for paneling and flooring. REUTERS/Rick Wilking (UNITED STATES) 

Beetle-killed pine trees stand near the Continental Divide in central Colorado April 8, 2010. Colorado has 3 million acres of forest killed by a tiny bug called the mountain pine beetle. When the beetle crawls under the bark to feed on the tree it brings with it a fungus that kills the tree. A byproduct of the fungus is a distinctive blue stain that streaks the wood. Different businesses are trying to come up with ways to use the all the dead trees - the stained wood is prized for its unique color for paneling and flooring. REUTERS/Rick Wilking (UNITED STATES) 

A stack of beetle-killed pine trees at the Confluence Energy wood pellet plant in Kremmling, Colorado April 6, 2010. The plant, the biggest pellet plant in the U.S. west of the Mississippi makes pellets for home heating from the trees. Colorado has 3 million acres of forest killed by mountain pine beetles. REUTERS/Rick Wilking (UNITED STATES) 

Beetle-killed pine trees that have been clear cut are piled up on national forest land outside Grand Lake, Colorado April 8, 2010. Colorado has 3 million acres of forest killed by a tiny bug called the mountain pine beetle. When the beetle crawls under the bark to feed on the tree it brings with it a fungus that kills the tree. A byproduct of the fungus is a distinctive blue stain that streaks the wood. Different businesses are trying to come up with ways to use the all the dead trees - the stained wood is prized for its unique color for paneling and flooring. REUTERS/Rick Wilking (UNITED STATES) 

Luc Nadeau, owner of Nature's Casket, lies in one of his products made from beetle-killed pine at his shop in Longmont, Colorado April 5, 2010. Colorado has 3 million acres of forest killed by mountain pine beetles and many uses are being found for the wood including casket making. REUTERS/Rick Wilking (UNITED STATES) 

An unusual pattern is left by forest fire as seen in this photograph of a mountain in Yoho National Park in British Columbia west of the Alberta border in this August 8, 2005 file picture. The fire was a controlled burn of forest areas infested with the mountain pine beetle. The pine beetle epidemic has killed millions of trees and affected some seven million hectares of forest in the province. Forestry officials have used controlled burns to kill the beetle and prevent the insect from spreading further. To match feature USA-FORESTS/BEETLE REUTERS/Andy Clark/Files (CANADA ANIMALS ENVIRONMENT) 

A pattern is left by forest fire as seen in this photograph of a mountain in Yoho National Park in British Columbia west of the Alberta border in this August 8, 2005 file photo. The fire was a controlled burn of forest areas infested with the mountain pine beetle. The pine beetle epidemic has killed millions of trees and affected some seven million hectares of forest in the province. Tree-munching beetles, malaria-carrying mosquitoes and deer ticks that spread Lyme disease are three living signs that climate change is likely to exact a heavy toll on human health. To match feature HEALTHCARE-CLIMATE/
REUTERS/Andy Clark/Files (CANADA ENVIRONMENT) 

An unusual pattern left by forest fire is seen on the side of a mountain in Yoho National Park in British Columbia west of the Alberta border August 8, 2005. The fire was a controlled burn of forest areas infested with the mountain pine beetle. The pine beetle epidemic has killed millions of trees and affected some seven million hectares of forest in the province. Forestry officials have used controlled burns to kill the beetle and prevent the insect from spreading further. 

An unusual pattern left by forest fire is seen on the side of a mountain in Yoho National Park in British Columbia west of the Alberta border August 8, 2005. The fire was a controlled burn of forest areas infested with the mountain pine beetle. The pine beetle epidemic has killed millions of trees and affected some seven million hectares of forest in the province. Forestry officials have used controlled burns to kill the beetle and prevent the insect from spreading further. 

A pattern in a mountainside forest left by a controlled forest fire in Yoho National Park in British Columbia. An unusual pattern left by forest fire is seen on the side of a mountain in Yoho National Park in British Columbia west of the Alberta border August 8, 2005. The fire was a controlled burn of forest areas infested with the mountain pine beetle. The pine beetle epidemic has killed millions of trees and affected some seven million hectares of forest in the province. Forestry officials have used controlled burns to kill the beetle and prevent the insect from spreading further. REUTERS/Andy Clark 

A pattern in a mountainside forest left by a controlled forest fire in Yoho National Park in British Columbia. An unusual pattern left by forest fire is seen on the side of a mountain in Yoho National Park in British Columbia west of the Alberta border August 8, 2005. The fire was a controlled burn of forest areas infested with the mountain pine beetle. The pine beetle epidemic has killed millions of trees and affected some seven million hectares of forest in the province. Forestry officials have used controlled burns to kill the beetle and prevent the insect from spreading further. REUTERS/Andy Clark