Breathtaking images and words from Esther Chetner's red-hot lava-quest adventure and sunset ride in Hawaii.
We may be as little as a tenth of the way to our goal, and there's no one easy way to pick up the pace, experts say.
Half our pine trees have been eaten alive in just the last nine years. A killing plague of billions of native pine beetles has been unleashed by the rapid, fossil-fuelled warming of BC. How bad will i
Director Barbara Ettinger's fascinating tale of a man on a mission to expose the dire but little known environmental impact of high levels of carbon dioxide in the oceans.