That field — only about 1 percent of the strength of Earth’s magnetic field — has probably been active for as many as 3.9 billion ... So iron sulfide at the top Mercury’s core could ...

"And while increasing sulfate concentrations have direct implications for ecosystems, they can also have indirect impacts, including changing how mercury is transformed within wetlands." ...

There are areas of northern Peru and southern Ecuador where artisanal miners are mining complex sulphide (refractory ... In many instances, mercury is used by the miners, who obtain as little ...

I will not argue Arneson’s contention of sulfide effects on wild rice and methyl mercury. What I will argue ... tax benefits of mining an estimated $3 trillion in copper, nickel and precious ...