Plastic products made of PVC, Polystyrene and other prominent plastics are flooding the market. They are a growing threat to the environment, as they are found in the sea or dumped in land fills .

A well-accepted measure for climate protection involves reducing greenhouse gas emissions . And buildings have the greatest energy saving potential, according to the official EU Energy Efficiency Plan 2011 .

Within a project called Ticket to Kyoto five European public transport companies try to drastically reduce their CO2 emissions. These companies are Dutch RET, British GMPTE, German moBiel, French RATP and Belgian STIB.