The era of renewable sources
Promoting sustainable development has a much broader meaning than satisfying energy demand via renewable sources. However, there is no doubt that the nexus between sustainability, the fight against climate change and the replacement of fossil fuels to reduce greenhouse gas emissions has projected renewable sources to the top of the agenda of global energy policy. However, we must not forget that 2021 the weight of modern renewables in meeting world energy demand was still only 13.5% (BP data), while the fossil-fuel triad (oil, coal and gas) contributed for 82.3%. We are therefore still fully living in the era of fossil fuels. How long will it take to fully enter the new era?