They need to be carefully managed because if we run out of the non renewable resources then we will have to change how we live and we also need to manage the renewable resources because if we do not then the Earth will be filled with pollution.
In the 1900s, the leading causes of death were due to <span>bacteria or viruses. It might be said that infectious diseases lead cause of death in the world and in the US. It was after 1950´s that infectious diseases and death rates form these illnesses were reduced.
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Go to the gym, work out. practice tour routine. Also, get a friend who does know to help! if that doesn't work, try again next year?