Humans could be about to trigger a huge vegetation change and disrupt their own environment. It has happened before, but this time it is happening fast
From Arctic "rave ice" to the reflective stratus of the Southern Ocean, clouds near the poles are causing climate modellers headaches, as Kate Ravilious reports
Waterlogged hillsides are dangerous; for those who live on them, or further downhill, they can be deadly. And the global risk from landslides is rising