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.
But before you put that 44-cent stamp on your next letter, MAKE SURE you understand the limitations on sending that letter first class through the USPS. 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. If your envelope is too large or too thick or contains too much weight, it will be returned to you from the Post Office because of âInsufficient Postage.â.