Hi,
9. What is the amount of fluoride concentration in water that's considered safe for the prevention of dental decay?
D. 1 part per million
J, L, I, K in order from 9-12
Yes it thinks it can im not 100% sure
I think it's B, because recycling reduces mining and drilling, both of which cause air and water pollution. Hope this made sense lol it's the closest one to the the true answer
CORRECT