While looking at the problems with fossil fuels we found out why green house gasses are a problem and what makes them a green house gas.

We made some molecules of gases found in the atmosphere and, through looking at structure and bonding, explained how green house gasses absorbed and then emitted radiation from the sun.

The Green Group found that we are surrounded by plastic.  They also found that plastic does not degrade and is a massive problem for the environment.

We went on a discovery of what plastic is and even re-evaluated what we know about solids, liquids and gasses.

http://www.fantasticplastic.org.uk/Funky_Looking_Chain.html

Could we replace plastic with degradable substances.

http://www.sciencebob.com/experiments/plasticmilk.php

http://www.sciencebob.com/experiments/polymer.php

We used potatoes and milk to make beads of plastic and decided which plastic would work the best.  We even considered marketing our beads.  Costing up time and raw materials needed made us re-think how we would make our millions...

And then there are the problems with introducing biodegradable plastic into the cycle:

http://www.fantasticplastic.org.uk/biz_biodegradable.html