Scientists in the Middle East have developed artificial clouds to provide shade for stadiums at the 2022 World Cup.
The researchers at Qatar University say the 'clouds' will help to cool the crowds during the summer tournament in the Gulf state, where temperatures in June and July can soar up to 50 degrees Celsius.
The artificial clouds, which will be produced at a cost of $500,000 (£310,000) each, will help to cool stadia which will be air-conditioned by solar power.
Saud Abdul Ghani, head of the mechanical and industrial engineering department, explained that the 'clouds' are made from a lightweight carbon structure and carry a massive envelope of material containing helium gas.
Four solar-powered engines would move the structure via remote control, which Gani said would make them "energy efficient and green".
"We are in discussion with the Qatar Science and Technology Park about the costs and to create an initial model on a trial basis," he added.