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A timeout is called by either team to stop the clock. Each team have three timeouts per half. The clock is also stopped after an incomplete pass or if the ball carrier runs off the field of play.

The sustainability of matches over lighters can tremendously improve how the environment is affected. Matches are biodegradable and environmentally friendly, which makes them an easy choice over a lighter. They are also produced in the USA, which means a smaller carbon footprint over imported disposable lighters.

The fumes from matches are toxic generally and any burning plant matter is toxic as it contains carbon monoxide. Matches are also burning sulfur and other chemicals.

Unlike plastic lighters, matches are made from wood and are fully biodegradable. Being biodegradable, matches generally don't contribute to our growing global waste problem, but their production comes with a different set of environmental problems.

Encroachment, False start, Holding (defensive/offensive), Offside, Pass interference, Personal foul, Roughing the kicker, Roughing the passer These are a handy list of common penalties in a football game.

If a coach believes an official has made an incorrect decision he can throw a red flag to challenge it. If his challenge is successful the original ruling is overturned, but if the challenge is unsuccessful the team lose one timeout.