He says the global economy must change to a sustainable system now before social issues and ecological degradation become overwhelming.

VOA: standard.2010.01.23

But the report singles out food production as the other major factor driving environmental degradation.

VOA: standard.2010.06.04

They say the population is getting older,the buildings are in a state of degradation, and more and more shops are being opened for the millions of tourists that visit the city.

VOA: standard.2009.10.27