The United Arab Emirates set a record for the world’s most affordable solar power earlier this week when renewable energy developers bid as little as 2.99 U.S. cents per kilowatt-hour to build a solar park in Dubai.

Within the next 14 years, every single roof in Dubai will be covered in solar panels.

Sheikh Mohammed Bin Rashid, the political leader of the wildly modern Middle Eastern city, announced last week that rooftop solar panels will be mandatory for all buildings in 2030.