What is ozone Is it good or bad?

It is halfway in between. If it is up above the clouds it helps us by giving us part of the Ultra Violent rays shot fraom the sun, if it wasn't there, well, we would be fried to a crisp. It could also be bad, if we breathe in ozone we could start having a hard time breathing, get asthma, or possibly get canser! So, it's halfway in between good and bad.