A British man has been selling fresh mountain air to people in polluted cities for £200 a bottle.
John Green, an IT consultant from London, has lived in the Swiss city of Basel for 20 years, and has been using his location to travel to the Swiss Alps to bottle up fresh air, which he plans to sell to people living in heavily polluted cities.
He said: "I actually go 3,000 metres (10,000ft) up to fetch it. I don't go into a car park to get it, honest.
"I have lived here for 20 years, and the Swiss don't know what they've got. The air really is something special.
"When I go up the mountains I really do feel better, I am not imagining it. I seriously feel almost reborn."
John's company, mountainairfromswitzerland.com - which sells air in three litre bottles for £200, one litre bottles for £135, or a pint for £75 - keeps the exact location of its air supply a secret, but purchasers will be sent GPS co-ordinates so they know the air is definitely the freshest it can be.
Speaking in a promotional video for his company, John said: "If you're sitting in some polluted town, which you probably are, gasping with diesel fumes, we're at 3,000 metres, and we've just got new supplies of mountain air...so get yours.
"Only purchasers will know where their jar of air was collected. We keep the extraction location a secret to protect supplies.
"All I can say is it is collected near a babbling mountain stream, fed by melt water from a famous glacier, near a very famous mountain."