Question

Cars pollute environment (question tag)

Answer 1

the correct answer is- don't they?

Answer 2

Cars pollute the environment, don't they?

The correct question tag to be used is ''don't they''

• The given statement is positive so we use the negative question tag.

• when we add a question tag, then the statement turns into a question.

• The verb ''pollute'' in the given sentence is present tense so we use ''don't''

• The noun ''cars'' in the given sentence is plural so we use ''they''.

Hence, the required question tag is ''don't they''.