Some say that renewables are not an existential threat and believe that they might take only a small piece of the pie by 2040, due to high costs and vital government subsidies. On the other hand, others believe that costs are declining fast, and it may take a significant share in power generation, knocking not just coal, but also natural gas off the throne. The fact remains that things are changing quite fast due to technological advancements. The breakeven cost of various renewable energy sources has come down significantly, and wind and solar energy are leading the charge. Total global cumulative wind power capacity reached 540 GW at the end of 2017, up from 93 GW in 2007. Meanwhile, solar went up from 100 GW in 2012 to close to 405 GW in 2017 , a four-fold increase. PV solar even surpassed nuclear generation capacity (403 GW in 2017). […]