Sources of Greenhouse Gas Emissions | US EPA Producing industrial products from materials that are recycled or renewable, rather than producing new products from raw materials. ... Making companies and workers aware of the steps to reduce or prevent emissions leaks from equipment. ... since over-application of nitrogen can lead to higher N 2 O emissions without enhancing crop production. Environmental Impacts of Mining and Smelting ... Lead and Mercury Emissions from Mining. Global releases of lead from smelting and refining nonferrous metals (e.g. gold, lead, zinc, copper) total over 28,000 metric tons/year. 1 Global releases of mercury from smelting and refining nonferrous metals total 710 metric tons/year – the second largest source after power plants. Is This Explorer Finding a Major Play in a Past-Producing ... 3 · The Homestake Gold Belt is one of the top gold producing belts in North America. Mineral Mountain Resources is a Canadian precious metals exploration company engaged in advancing projects with special merit in leading mining regions, .    Read More