Calculators were previously used for basic math equations, but now they have just gotten a little fancier. Researchers at the W.K. Kellogg Biological Station have developed a Greenhouse Gas Emissions Calculator, a helpful device for farmers who trade this on markets. The calculator is available online and uses inputs such as crops, farming techniques, and fertilizers to determine how much carbon dioxide and nitrous oxide were produced. Researchers hope that this tool will assist farmers in making more environmentally-friendly decisions.
http://www.sciencedaily.com/releases/2010/08/100809093643.htm