Dont use air conditioner.

-- Don't use air conditioners.

Use the fan.

-- Use fans.

Don't use water tissue.

-- Don't use wet wipes.

(Note: Water tissues are also known as Wet Wipes) ^^

Don't often eat hamburger.

-- Don't often eat hamburgers.

(Note: Please take note of "s" in hamburgers. So that you will know if you are referring to just one hamburger or any hamburgers.) ^^

* Good work, Sky! I'm glad that you care for our environment.

-- Teacher Judy =)