TOURISTS have long been drawn to Hell’s Gate National Park in Kenya by its steep cliffs, plentiful zebras and spectacular canyons. Recently there is a new attraction; a spa set amid the cliffs, with a huge pool heated by the energy stored in the Earth’s crust. Curiously, it is not run by a tourist company, but by KenGen, the national electricity generator. It abuts the Olkaria geothermal power plants, from which plumes of steam pour into the sky. Since 1982 four power stations have opened here; a fifth is being built and work on a sixth will begin soon. Energy harvested from volcanic heat now provides almost half the power Kenya needs. Authorities say hackers, likely with the backing of a country, launched a cyber-attack against power plant software, shutting down operations at the as-yet unidentified power plant.The newly opened Mokran Solar Power Plants Complex is the latest proof of Iran’s ambitions in renewable energy.