And the last task on the text 'Home Appliances'. Read the last paragraph of the text again and answer the question after it.

The last paragraph of the text is:

And the sixth appliance makes you feel comfortable if it is very, very hot or if it is very, very cold. I don't like to use this so often because it is not so good for our environment.

The question is:

Why doesn't the author like to use the sixth appliance so often?

This appliance is harmful to the environment.
This appliance is quite expensive.
This appliance helps the environment.