Other key factors are car ownership (eases the transport of bottled water), living in urban area, and the lack of trust in government or local authorities (Table C.6). The lowest the P>|z|, the highest the correlation. Because they invest less in bottled water, as it would represent a higher share of their disposable income, lower income groups are more likely to be exposed to water pollution and potentially “pay” a higher share of the health costs of policy inaction. The same reasoning applies between the urban and the rural population (Figure C.14).