How clean is solar power ?
▻http://www.economist.com/news/science-and-technology/21711301-new-paper-may-have-answer-how-clean-solar-power
Likewise, the amount of time needed for a solar panel to produce as much energy as was involved in its creation has fallen from about 20 years to two years or less. As more panels are made, the manufacturing process becomes more efficient. The team found that for every doubling of the world’s solar capacity, the energy required to make a panel fell by around 12% and associated carbon-dioxide emissions by 17-24%.
#énergies_renouvelables #électricité #climat
▻http://www.nature.com/articles/ncomms13728