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morpeh [17]
3 years ago
5

A substance produced by some insects that was used to make records before world war II

Chemistry
1 answer:
ryzh [129]3 years ago
7 0
Are you doing that science crossword puzzle?
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C.

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The Clean Air Act was enacted in 1973 and brought to action in 1990. The act was passed to supervise air emissions to ensure clean air and atmosphere for people. The act was passed in the wake of premature deaths of hundred of thousands people. The act works with NAAQS to ensure safe and clean air for the safety of public health.

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