In this 2009 photo released by Steve Sillett, The President, a Giant Sequoia Tree, is shown in Sequoia National Park, Calif. After 3,240 years the Giant Sequoia is still growing wider at a consistent rate, which may be what most surprised the scientists examining how they and coastal redwoods will be impacted by climate change and whether they have a role to play in combatting it. (AP Photo/Steve Sillett) MANDATORY CREDIT

Associated Press
In this 2009 photo released by Steve Sillett, The President, a Giant Sequoia Tree, is shown in Sequoia National Park, Calif. After 3,240 years the Giant Sequoia is still growing wider at a consistent rate, which may be what most surprised the scientists examining how they and coastal redwoods will be impacted by climate change and whether they have a role to play in combatting it. (AP Photo/Steve Sillett)  MANDATORY CREDIT
In this 2009 photo released by Steve Sillett, The President, a Giant Sequoia Tree, is shown in Sequoia National Park, Calif. After 3,240 years the Giant Sequoia is still growing wider at a consistent rate, which may be what most surprised the scientists examining how they and coastal redwoods will be impacted by climate change and whether they have a role to play in combatting it. (AP Photo/Steve Sillett) MANDATORY CREDIT
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