The Eiffel Tower in Paris has been lit up using a next-generation energy source -- carbon-free renewable hydrogen.
The iconic landmark was illuminated on Tuesday as part of an exhibition to showcase fuel-cell technologies.
A power generator using the same type of hydrogen fuel cell fitted in Toyota Motor's Mirai car produced the electricity to light up the tower.
The generator with a maximum output of about 100 kilowatts only emits water vapor.
Countries around the world are racing to develop hydrogen-related technology. France plans to invest more than 8 billion dollars in the sector by 2030.