Maintaining a safe environment is important for improving quality of life and rising the number of years spent healthy. Environmental factors are responsible for 23% of all deaths worldwide and 26% of deaths among children under the age of 5.
If im correct to me "stay positive" means to have a happy optimistic and overall good attitude to whatever or whoever it may be refering too. "Keep going" in this sentence just means to continue to proceed forward or carry on.
I believe the answer to this question is A boyle's law
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natural disasters i belive. hope this helped :))
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