Simazine is a chemical used to kill weeds and unwanted plants.
Some people might think of simazine as helpful, but others might worry about its effects on the environment.
Examples:
Farmers use simazine to keep their fields free of weeds.
I sprayed simazine on the garden to get rid of the weeds.
The simazine killed all the weeds in the field.
The simazine made the plants disappear!
Simazine is so strong, it can kill all the weeds in a day.
The simazine is like a superhero for the plants, killing all the bad guys.