Air quality is a public health issue. As recently as last October, the World Health Organisation classified global outdoor air pollution as ‘ carcinogenic to humans .

The scientific community now widely recognises that salt, sugar and fat in excess in food lead to health issues . Among these are obesity, hypertension and cardiovascular diseases.

Energy efficiency has become a key objective in the current context of increasing energy demand, decreasing resources and global warming. Key to efficient energy savings, however, are users' awareness and behaviour.