USA Today story on San Antonio: exhibit A for those that assume we cannot do better on efficient use of resources.
In mid 1990s, city was slapped with restriction of use of aquifier due to endangered species (rare blind salamander). Instead of looking for new sources, the city went big on cutting use (recycling, more efficient toilets pushed throughout city, etc.).
City now uses the same amount of water it used in 1984, even though population is two-thirds larger. Citizens average about 2/3rd the national average water use.
All of this is crucial given Texas' long and harsh drought - a harbinger of things to come with climate change.
Mayor: "We practice [conservation] religiously. It's part and parcel of being a San Antonian."