Reducing resource use means just what it says using fewer resources. There are lots of ways to reduce our use of resources. Buy durable goods. Choose items that are well made so they will last longer. Youll buy fewer items in the long run, so youll save money as well as resources. Thats a win-win! Repair rather than replace. Fix your bike rather than buying a new one. Sew on a button instead of buying a new shirt. Youll use fewer resources and save money. Buy only what you need. Dont buy a gallon of milk if you can only drink half of it before it spoils. Instead, buy a half gallon and drink all of it. You wont be wasting resources (or money!) Buy local. For example, buy local produce at a farmers market, like the one in Figure 2.20. A lot of resources are saved by not shipping goods long distances. Products bought at farmers markets use less packaging, too! About a third of what we throw out is packaging.
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QUESTION: What are two examples of repair rather than replacing?

The documentary portrays a behind-the-scenes look at the poor state of Argentina's civil aviation , and puts the blame on the Argentine Air Force . The Air Force has been in control of air traffic operations since the military takeover of General Juan Carlos Ongan a in 1966 . The producer/director , Enrique Pi eyro , claims Argentina and Nigeria are the only countries whose air force controls and regulates the airline industry . Pi eyro , a former Argentine airline pilot , makes his case in the documentary using diagrams , 3D animations , interviews , hidden cameras in the control tower , and a few props . For example , at one point he spills out a bag of plastic airplanes and equates it to the number of planes the air force has lost due to negligence . The film is heavily based on the Austral L neas A reas Flight 2553 plane crash . Enrique Pi eyro takes his camera , secretly , into the control tower of the Ministro Pistarini International Airport also-known-as Ezeiza , the international airport at Buenos Aires .
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QUESTION: Which director uses a bag of plastic airplanes to demonstrate the poor state of the Argentinian civil aviation industry?

Static electricity is like a teeter-totter. What happens if a teeter-totter is balanced? Correct! It does not move. What about when its not balanced? Yes, it will now begin to move. Charges move when they are not balanced. Charges can build up by friction. Maybe you rub your feet on a wool mat or carpet. Rubber soled shoes readily gain charges. The wool carpet easily gives up charges. The two items become unbalanced. One item has a positive charge. The other has a negative charge. The difference in charge is called static electricity. Just like the teeter-totter, something is going to move. Positive charges build up on the mat. Negative charges build up on you.
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QUESTION: What two types of charges build up in unbalanced items?

Fossils may form in other ways. Fossils can be preserved almost completely. In this process, the organism doesnt change much. As seen below, tree sap may cover an organism. With time, the sap hardens. It turns to into amber. The original organism is preserved. This is very exciting for scientists. They are able to study the DNA of the organism that no longer lives on Earth. Some animals have been found frozen in ice. Others have been found in tar pits after falling in. Molds and casts are another way organisms can be fossilized. Have you ever walked in soft mud and left footprints? Once in a while, these traces of organisms can be preserved. In this case, nothing is left of the organism. A mold is an imprint of an organism that is preserved in rock. The organisms remains break down completely. There is nothing left of the original plant and animal.
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QUESTION:
How can fossils be completely preserved?