The use of wood, the only CO2 positive material, is not only sustainable, but makes the house lighter and required less piling on a demanding hilly terrain.
使用木材不仅实现了项目的可持续性建设，也使房子变得更加轻盈，这样就可以有较少的打桩以应对丘陵地形。
2
We sat in a line on one side of the fence watching the timber coming and going for a while and Peter's dad piling things up and looking very satisfied with all of his wood.