It would simply be "They respect each other".
Respect in time tenses is either spelled, "Respected", "Respect", or "Will Respect."
The fact that it's third person does not change the word since it can be said as "I respect you", "You respect yourself" "They respect each other"
Revision literally means to “see again” or to basically see something again from a fresh and critical perspective. One of the best things to do during the revision stage is to have someone else proof read the material for you.
Personification.
Rubs is the key word because smoke can't really rub things like a human, so it's personifying human behavior.
Hope that helps!
:D®
Some things you could talk about in your letter are the hazards of litter and polythene. State the reasons why you believe actions should be taken and describe your concerns in your letter. Describe why this is bad for our environment and health. Convince them to see your point of view in the letter by coming from a place of concern, think about health concerns of others. I hope this helps.