With demand for fossil fuels expected to peak by the end of the decade, the focus is shifting towards lithium, cobalt, copper and other materials that are extracted from the earth through heavy labour and leave scars in the environment.
Demand for lithium -- an essential component of car batteries -- could increase ninefold between 2022 and 2050, according to the International Energy Agency (IEA).
Lithium demand has already tripled in the past five years.
Lithium and other metals that the IEA calls "key to the clean energy transition" will be the topic of a summit hosted by the global energy watchdog in Paris on Thursday.
Demand for cobalt will have increased from 171,000 tonnes to 524,700 tonnes by 2050, according to the IEA, with nickel requirements set to soar 120 percent in the same timeframe.
The IEA said in a July report that investment in the mining sector is still insufficient to meet demand, and also flagged concerns that a high concentration of new projects were clustered in a small number of countries.
"This is a huge issue," said Jason Schenker, president of Prestige Economics. "We have massive shortfalls across commodities."
- 'A lot of money' -
Swedish management company AuAg Funds has developed an investment portfolio dedicated to "essential metals", where the money placed in the fund is invested in shares of mining companies, smelting, refining and other parts of the supply chain.
"We give exposure through equity to all metals: copper, silver, aluminium, lithium, uranium, cobalt," Christopher Svensson, founder and co-portfolio manager at AuAg Funds, told AFP.
To comply with financial regulations, however, it is not possible for them to invest directly in a specific project, only in the companies.
Schenker warns a lot of investment is needed in projects that will take a long time to deliver.
"The amount of additional mining, refining, smelting, and everything that's going to be needed to get us where we need to be in terms of supply is a number very difficult to come to, because every time you're opening a new mine, it involves a lot of money," he said.
"These are large capital investments and they take many years to put in place before you really begin to see that return and the number of mines," added Schenker.
Svensson said it needs "15-20 years to start a new mine".
- Compromise and sacrifice -
The mining sector also presents significant concerns around human rights and environmental pollution.
Cases where the lives of mine workers are endangered, natural habitat is destroyed or local populations are negatively impacted regularly steal headlines.
Others express concerns over carbon emissions from production and refining sites.
"If you feel passionately about sustainability, I imagine it's got to be pretty tough to hear that the future of clean energy requires a trade-off, as more mining and that's also going to have negative impacts," said Schenker.
Investors in environmental, social, and corporate governance (ESG) have to choose "do we sacrifice the S, or the G, or the E for the energy transition," said Margot Seeley, ESG analyst at ABN AMRO Investment Solutions.
AuAG claims to have a strict policy for selecting its portfolio companies, and Svensson said their structure allows institutional investors to get involved.
"We want companies that are extracting metals in the best environmental way," he added.
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