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Plastic was also easier to transport because of its light weight, Hoell added, and she cited some analyses suggesting that it has a lower carbon footprint than alternatives like steel.

The film can jam up the machinery — not only potentially destroying expensive technology but imperiling workers — or, because of its light weight, get sorted into paper waste and contaminate it, making it unsellable.

When ballooning, the light weight of the baby spider allows it to take flight by catching a breeze.

The alloy is known for excellent corrosion resistance, light weight and strength but cannot be produced by all suppliers, said Zhao.

I do light weight sometimes because weight-bearing exercise helps your bones and your bones start to thin at this age.