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.
Listed below are the countries and their price groups and weight limits for the five principal categories of international mail. Complete tables of prices are available in Notice 123, Price List. n/a = Service is not available. 1 Priority Mail Express International Flat Rate Envelopes maximum weight: 4 lbs. 2 Priority Mail International Flat Rate Service maximum weights: Flat Rate Envelopes and Small Flat Rate Priced Boxes, 4 lbs.; Medium and Large Flat Rate Boxes, 20 lbs. 3 First-Class Mail International maximum weights: Letters, 3.5 ozs.; Large Envelopes (flats), 4 lbs. Note that the heading in the maximum weight column lists both ounces and pounds (ozs. / lbs.) and that there are two numbers in the entry for each country (3.5 / 4) - this indicates that the maximum weight for Letters is 3 ...