This week Beijing announced that it would close the last of its four largest coal-fired power plants, the China Huaneng Group Corp's 845MW power plant, in 2016. The four coal-fired plants will be replaced by four gas-fired plants with 2.6 times more electricity capacity than the former coal plants. China's policy makers are also encouraging increased use of hydroelectric power, solar and wind and is trying to restart its nuclear power programme.

In the same week, the Independent reported that Costa Rica had achieved a renewable energy milestone, having used 100% renewable energy for the preceding 75 days. The achievement was reportedly made possible by heavy rainfall, which powered four hydroelectric plants. Costa Rica has an impressive track record when it comes to energy sources. In 2014, 80% of its energy came from hydropower and 10% came from geothermal energy. In total, 94% of its energy requirements were met by renewable energy.

However, this week we also heard that Dangote is building the world's biggest oil refinery, which will process 650,000b/day. It will also be Nigeria's first oil refinery. Aliko Dangote, owner of Dangote Group, decided to up the initial design from 450,000b/day because he believes that Nigeria, as a leading producer of crude oil, should also be credited with local refining capacity. Currently, Nigeria produces crude oil, but has to buy refined products from abroad. The refinery is expected to be fully operational by 2017.

Efforts to increase renewable energy should be strongly encouraged - the benefits to the planet and its population are undeniable. However, renewable energy technology has a way to go (if ever) before it can entirely replace fossil fuel-derived energy, which makes Dangote's investment a safe bet. As renewable energy like solar and wind power is entirely reliant on nature, supplies can never be assured.

While sporadic supplies to houses and small businesses may be part of the price we eventually have to pay for a greener world, larger businesses like supermarkets and cement plants, which could lose millions (or billions) from power outages, will surely have something to say, and a lot of sway, when it comes to relying completely on renewable energy. In addition, power outages to essential services like hospitals are unthinkable when it comes to the health of our loved ones. Ultimately, the argument for relying on renewable energy may well be won by utilitarians' 'greater good' argument, but how would it feel to know that your sick child could have been saved by fossil fuel-derived energy?