What's a good idea for a poster about soil conservation?

Question

What's a good idea for a poster about soil conservation?

Answer 1

How's this?  

What if the foods we all love didn't have any soil to grow in?

Answer 2

Worm funerals

Answer 3

If you want an idea for a picture, you can show a sieve with the layers of soil in it. Show plants and animals on top of the soil layer and show the particles of soil falling down on the lower side though the holes on the sieve. You can put any slogan with it.

Answer 4

There are some great old photos from the dust bowl in the 1930's.  You could use one of those and say something like "Don't let it happen again.  Conserve the soil."