Flushing daily disposable lenses down the toilet is increasing the threat from plastics, say experts.
Living on Mars time, landing nightmares and sometimes spreadsheets... a day in the life of a Nasa engineer.
Ministers say they are looking at measures after thousands support action to reduce single-use items.
Dairy farm aims to produce food more sustainably
How to manage heat in a supersonic car
When a heatwave turned London into a stinking sewer
What's behind the global hydropower boom?
Why Europe's busiest airport is a magnet for heat
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