Public expenditure can be classified on the basis of benefits they confer on different groups of people. Common benefits to all: Expenditures that confer common benefits on all the people. For example, expenditure on education, public health, transport, defence, law and order, general administration.
More than 4.5 million American lives are saved each year by a single, selfless act--donating blood. In fact, just one pint of blood can help save up to three lives. Although 60 percent of the U.S. population is eligible to donate blood, only 5 percent actually do. There are several reasons for the low turnout, says Ronald Sacher, MD, Hoxworth Blood Center director and professor of internal medicine and pathology, ranging from nasty weather to discouraging myths.
People burn approximately 650 calories per donation of one pint of blood, according to the University of California, San Diego. A donor who regularly donates blood can lose a significant amount of weight, but it should not be thought of as a weight loss plan by any means.To donate blood the American Red Cross requires donors to weigh at least 110 pounds and maintain healthy iron levels in the body.hole blood donors can also donate platelets 72 hours after a whole blood donation, and vice versa. Blood donors must be 17 years old in most states, with some states lowering the limit to 16 years old with parental consent.