The Federal Aviation Administration (FAA) shares the Environmental Protection Agency's (EPA) concerns about lead emissions from small aircraft. Owners and operators of more than 200,000 piston-engine aircraft operating in the United States rely on aviation gasoline (avgas) to power their aircraft.
Symmetry (noun). a due proportion of the several parts of a body to each other; adaptation of the form or dimensions of the several parts of a thing to each other; the union and conformity of the members of a work to the whole. Symmetry (noun).
Symmetry in nature is the balanced distribution of complementary parts of the natural world. This balanced distribution is exemplified in the bilateral symmetry of most vertebrae, whose left and... Symmetry in nature is the balanced distribution of complementary parts of the natural world.