30% of aluminium and steel from recycling? How were they able to actually do that?
I don't know. Some countries in Europe are really focused on recycling. And probably it's easier to recycle (and less polluting? - I haven't looked into this) than to process primary ores.
Recycling is easier, I guess it's even going to be beneficial going forward. There are far too many wastes that can be reused
The collection part is one thing. I don't know if there is another filter besides the collection centers, and then they also need to be processed into the raw material (melted in the case of steel or aluminum).