Answer:
The Clean Air Act was important because it emphasized cost-effective methods to protect the air; encouraged people to study the effects of dirty air on human health; and created a regulation that makes any activities that pollute the air illegal.
Explanation:
Answer:
It is B! It has the best option because it has the MAIN part.
Explanation:
Answer:
Perubahan keadaan jirim juga perubahan fizikal. ... cair dan berubah bentuk daripada pepejal kepada cecair, air tersebut masih lagi mempunyai sifat air.
