Sponsor Message. Adults are continually bombarded with messages about how eating foods rich in cholesterol can elevate an individual's risks of atherosclerosis and heart attacks. Many such warnings have focused on eggs because their yolks are a major dietary source of cholesterol.
It is estimated that 90 percent of Americans have flown in their  lifetime. This is up. It is estimated that 21 percent of Americans  have flown within the last three monthsâ¦ alone. Making the world better, one answer at a time.
While the total miles driven in the U.S. rose 3.8% from 1948 to 2004, they've been flat since. Gas prices, disdain for the commute, a 4% drop in vehicle ownership since 2006 and a 4 percentage-point drop in licensed drivers since 1992 are all sucking the joy out of the road trip. Americans are still vacationing, but they're not doing so with an easy conscience.