The 4th edition of WasteEng Conference 2009 wishes to reduce paper usage in order to contribute to environmental protection. So, on the one hand the conference proceeding will be in CD format and this is fairly commonplace nowadays. On the other hand, all presentations will be posted online in real time during all sessions to further green initiatives and reduce environmental impacts of this event.Thus, the amount of paper used in copying will be reduced to the minimum during the conference.

That is the reason why all authors should submit a full paper and keep an electronic copy of their presentations.