California has been besieged by wildfire this year, taking a huge toll on wildlife as well as human communities.
Giant sequoias – the largest trees on earth – can weigh more than 6,000 tonnes and can live for more than 3,000 years, but have suffered in the relentless fires.
Sequoia National Park guide Christy Brigham is overcome with emotion when she sees these trees, specially adapted to withstand flames, reduced to charcoal.
But as a result climate change and a policy of suppressing small fires, conflagrations have been burning bigger and hotter, destroying the ancient trees.
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