S: Styrofoam can be good for nature...sort of. I had three antique food crocks from my mom's side of the family and wanted to use them as planters, but I didn't want to drill holes in the bottom of them for drainage. I had heard you could use styrofoam packing peanuts in potted plants to aide in drainage. I filled the bottom of the containers about 1/4 to 1/3 full with peanuts (making sure I used the non-biodegradable kind). Then I filled the rest up with dirt. The peanuts help prevent the roots from rotting by keeping them out of standing water and they also make the planter much lighter. I did this with some of my indoor plants too. Poor drainage is a huge no-no for potted plants but there are so many fun things to use as planters that don't have holes in the bottom! This way you can cheat a little and still have healthy plants in decorative planters.