Here are just a few facts to help convince you that the topic of concrete deserves to become a part of your science curriculum:

	Concrete is everywhere!! Roads, sidewalks, houses, bridges, skyscrapers, pipes, dams, canals, missile silos, and nuclear waste containment. There are even concrete canoes and Frisbee competitions.
	It is strong, inexpensive, plentiful, and easy to make. But more importantly, it's versatile. It can be molded to just about any shape.
	Concrete is friendly to the environment. It's virtually all natural. It's recyclable.
	It is the most frequently used material in construction.
	Slightly more than a ton of concrete is produced every year for each person on the planet, approximately 6 billion tons per year.
	By weight, one-half to two-thirds of our infrastructures are made of concrete such as: roads, bridges, buildings, airports, sewers, canals, dams, and subways.
	Approximately 60% of our concrete highways need repair and 40% of our concrete highway bridges are structurally deficient or functionally obsolete.
	Large cities lose up to 30% of their daily water supply due to leaks in concrete water pipes.
	It has been estimated that the necessary repairs and improvements to our infrastructures will cost $3.3 trillion over a nineteen-year period. $1 trillion of that is needed for repairing the nation's concrete.
	Cement has been around for at least 12 million years and has played an important role in history.