If we have evidence that certain gases are harmful to our atmosphere, then why are we still using them?

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

Aswimming pool whose volume is 10 comma 000 gal contains water that is 0.01% chlorine. starting at tequals0, city water containing 0.003% chlorine is pumped into the pool at a rate of 5 gal/min. the pool water flows out at the same rate. what is the percentage of chlorine in the pool after 1 hour? when will the pool water be 0.006% chlorine?

Why are nonmetals more likely to react with eachother by sharing electrons