BBC News - World
Updated: 1 hour 24 min ago
There is speculation that China might restrict rare earth minerals to the US. What could the impact be?
Encouraging recycling as a moral good may not make sense.
Moving earth is messy - but new technology means we can dig with an accuracy of a few centimetres.
The country's government says it has become a dumping ground for wealthier nations.
The Biden camp accuses President Trump of siding "repeatedly with a murderous dictator".