We started with biomass, and we needed biomass here 5,000 years ago, 10,000 years ago, when it was cold and when people had to get through winter with no insulation, without anything, it took biomass.
On est parti de la biomasse, et il fallait en avoir de la biomasse ici, il y a 5 000 ans, 10 000 ans, quand il faisait froid et qu'il fallait passer à travers l'hiver sans isolation, sans rien, cela prenait de la biomasse.