Everybody is talking about sustainability and climate change. And this is great! In the private as well as in business related areas a lot of attention has to be paid on sustainability and the reduction of CO2 emissions. The initiative klima.aktiv of the Austrian Department of Environment faces that challenge day by day and accompanies various players step by step towards the respective climate goals. Since 2009 our central hotel in Vienna is an official partner of klima.aktiv. Since then, our pursuit of reducing our CO2 emissions in our green hotel in Vienna was even more intensified.