The proposal would still face a vote from the full assembly to be included in the final draft text, which would itself go before a national referendum vote later this year.
Copper prices are set to languish this year, a Reuters poll of analysts showed, weighed down by weaker demand as rising interest rates curb economic growth.
Researchers have discovered a ‘Goldilocks zone’ at the base of the earth’s crust where temperature allows for metals to be transported to shallower levels near the surface.