More and more of the capital’s best known monuments may now be illuminated through solar energy.

Building on the experience gained over the last three years and keen on promoting the use of environment—friendly solar energy, the Delhi government plans to light up more of the capital’s historical sites through cheap and plentiful energy from the sun. The 13th century Qutub Minar, the 17th century red sandstone Red Fort and the 16th century Humayun’s Tomb — all declared UNESCO World Heritage Sites — are among the six sites where the Delhi government plans to install solar power plants to replace conventional sources of electricity.