Here is most all of what investors in exploration-phase mining companies need to know over the next several years.

“Declining ore grades for copper, continued lack of investment in new mines and the time required to bring new discoveries to production will constrain metal availability and, ultimately, the metal sector's ability to meet growing demand from automakers for battery electric vehicle production,” Carol Cowan, a Moody's Senior Vice President wrote.

http://www.mining.com/battery-metals-supply-crunch-slow-near-term-evs-growth-moodys/