Canadian miner wants to open underground potash mine beneath pastures in Autazes, Amazonas, but needs US$2.8 billion and 4.5 years of construction while the per-tonne price swung from US$300 to US$1,200 over five years

Potássio do Brasil, controlled by Canada's Brazil Potash, says it needs to raise US$2.8 billion to build an underground potash mine in Autazes, Amazonas, with construction taking four and a half years after funding is secured. CEO Matthew Simpson made the announcement at a Brasília seminar on November 11, 2026, citing a price swing from US$300 to US$1,200 per tonne over five years.