Coal is the leading source of power generation in the world, accounting for more than 38% of total electrical output, unchanged for the last 20 years. Natural gas comes in second, having sharply increased its contribution to the power generation (or electricity) mix. Renewable energies (excluding hydro) still make up only a very minor percentage, but have gained a lot of ground, now standing at over 9% compared with 3% ten years ago. They play a much bigger role in Europe, at nearly 20% of the mix. Similarly, nuclear represents more than 23% of European power generation, mostly due to its preponderance in France, where it accounts for more than 70%. However, several European countries plan to scale back nuclear power, or even phase it out altogether.