Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
There is no clear indication at this time that soil metal concentrations have changed within the past two or three decades. However, atmospheric emissions from Vale Inco and Xstrata Nickel have been reduced by over 95% in recent years so it is expected that soil metal levels will decline over time.
