The world’s iron ore producer has faced continued backlash from Brazilian authorities since the deadly mining dam accident that killed around 300 people in January.
Producing a single metric ton of steel in a blast furnace typically releases around 2.3 tons of carbon dioxide, not much less than you’d get from burning a ton of thermal coal for energy.
Brazil's government wants Congress to reconsider a decades-old proposal to allow mining in indigenous reserves, which occupy 13% of the country's territory.
The train had to be deliberately derailed after it reached speeds of 162 km/hour (101 mph), destroying two locomotives, 245 ore cars and 2 km (1.2 miles) of track.