In this remix, I did the following:
1. gave an agent the camera
2. added the following widget: drop pollution
3. changed the collision response: from pink pyramids to yellow clownfish2
4. added new breeds: pollution (black spheres) and grass
5. added a new widget: speed (new slider)
6. added a new procedure in the "grass" folder, which orders the grass to "wiggle" from left tp right or vice versa when the procedure "wiggle" is toggled (but this doesn't seem to be working, so I'm going to get back to it and find out what's wrong.)