There are two ways you could present this information. Sentences Keep the environment clean by walking instead of using cars to travel. Don’t throw out garbage into the street. (Don't litter) Don't use plastic bags too much, buy reusable bags to take shopping with you. Use natural products and try to depend less on man-made chemicals. List. Keep the environment clean by: walking instead of using cars, don't litter, don't use plastic bags too much and use natural products instead of relying on man-made chemicals.

You could say 'You weirdo' which infers their behaviour is strange and therefore crazy. I say it rather than saying 'You're crazy'

Blur:

He gradually felt himself becoming weaker and weaker, his eyesight, and the image of things before him began to blur.

Elicit:

Teachers should try to employ a variety of teaching strategies in order to elicit maximum responses from their students.


Disheveled:

After spending three days working in his laboratory, Jim comes out with a very disheveled and tired appearance.


Laugh off:

Each time someone asks Mike the monk how he manages to bear a life without being able to taste anything, he just laugh off those questions naturally and strolls away.

 (Are you talking about the sense of taste here?)

Propel:

It's said that rocket there does not need to be propelled by a fuel source. It can go up on its own with a greenish-shimmering flame. How strange it is!

Hope this helps. I have been at work all day so I might have missed some errors. All in all you have a firm grasp of English. The content of your sentences shows you understood the vocabulary.