1.   But, above all, better water supplies and the construction of sewers meant improved public hygiene.

2.   One of the most talked-about new theories is that the rise in asthma is related to improved hygiene.

3.   The strategy calls for developing clean water supplies to encourage improved personal hygiene.

4.   But in the long run, savings could be made in the form of improved hygiene, improved availability and quality, longer storage life and processing convenience.