Characteristics: Bismuth is a brittle, silvery-green metal that has a low melting temperature and high specific gravity. Being both stable and non-toxic, bismuth is often used as a replacement for toxic metals such as antimony, cadmium, lead and mercury.
1 (Minimums vary by location and tank size, and can range from 100-1,500 gallons.) More often, the propane company charges a fee of anywhere from $25-$250 a year but averaging around $75-$130 annually, depending on local rates, the size of the tank and whether it's aboveground or underground.
forecasts 2015 gas prices to average $2.64 a gallon. That's 70 cents below 2014's $3.34 average and nearly $1 a gallon below 2012's all-time record of $3.60. Plummeting prices will save U.S. motorists about $97 billion overall this year, or about $750 per household, says GasBuddy.com senior analyst Patrick DeHaan.