Car exhaust is an unhealthy result of fossil fuel use. Photo Credit exhaust fulmes image by bilderbox from Fotolia.com. Fossil fuels are among the most commonly used forms of energy in the world. Common fossil fuels include natural gas, coal and petroleum, which is refined to create gasoline.Although fossil fuels are strong sources of energy, their use can pose certain health problems if handled incorrectly.ar exhaust is an unhealthy result of fossil fuel use. Photo Credit exhaust fulmes image by bilderbox from Fotolia.com. Fossil fuels are among the most commonly used forms of energy in the world. Common fossil fuels include natural gas, coal and petroleum, which is refined to create gasoline.
First-Class Mail International is a USPS trademark. Note: The cost of postage will appear on all international shipping labels. Maximum weight for letters is 3.5 ounces. Maximum weight for large envelopes is 4 pounds.
â A first-class stamp has size & weight limitations. The maximum size allowed with a 44-cent stamp is 11â³ X 6â³ X 1/4â³ thick. The maximum weight is 1 ounce, or about 4 pieces of paper inside a normal-sized envelope. â Using more than one 44-cent stamp on an oversized letter or package can be VERY inefficient. For instance, letâs say you are mailing a letter that is just over 1 ounce in weight.