Technology
Into thin air: Gliding to 90,000 feet
A record-breaking pilot with lofty ambitions aims to fly higher than ever before, and he won't be needing an engine
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A record-breaking pilot with lofty ambitions aims to fly higher than ever before, and he won't be needing an engine
The CO2 emitted by aeroplanes is helping to warm the world – but a new study suggests contrails may be an even greater problem