Outside, some 500 meters along the River Lulea is a hydrogen power plant, a source of abundant cheap and renewable energy.

矿场外，吕勒奥河沿岸约500米处是一座氢发电厂，产出大量廉价和可再生能源。

The Lulea plant uses a process called low-temperature alkali-roasting to release impurities from graphite's crystal structure.

吕勒奥工厂使用一种称为低温碱焙烧的工艺来释放石墨晶体结构中的杂质。

This is where the team is developing fossil-free  steel – at a pilot plant in the city of Lulea.

这就是该团队在吕勒奥市的试验工厂开发无化石钢的地方。