Day Zero: how Cape Town stopped the taps running dry

Tucson has slashed its per capita water consumption by more than a third, and one of the more startling ways it's done that is by reusing water after it's flushed down the toilet or run through a washing machine.

Water:Charity assumed that money and celebrity exposure would be able to solve the world’s access-to-clean-water crisis. But this approach often led to more abandoned water pumps. Charities – and journalists who cover them – are now working to concentrate on making their solutions sustainable.

Raton, a town once surrounded by eight coal mines, now has a main street of boarded-up buildings. There is reason for optimism as the town diversifies its local economy, betting on "a mix of small manufacturing businesses, health care and specialty services, and hospitality for travelers" to endure the sudden decline in mining revenue. Its calculated revitalization may hold lessons for other towns.

Climate change has led to shorter, more violent rainy seasons in the highlands around Lima, Peru, meaning that - even though there is theoretically enough water during the rainy season to sustain the local population, it flows downhill too quickly, leaving residents short of clean water during the dry season. Now, an organization called Condesan is helping the community to restore ancient stone canals from the seventh century that will help to store water from rainfall through the dry season and supply residents with a steady water source.

Fariel Salahuddin was determined to tackle the extreme lack of access to fresh water she encountered in rural Pakistani communities, but she wanted the model to be sustainable, not dependent on donations. Most of the communities didn't have regular access to rupees to help sustain their solar water pump micro-enterprises - what they did have, however, were goats. Salahuddin set up a scheme where villagers could pay for their clean water access with livestock instead of cash, which she then sells using Facebook at high rates during Muslim festivals to generate a sustainable revenue source.

A group called Backcountry Hunters & Anglers, now 36,000 strong, is bringing together people from different political and ideological backgrounds over a common interest in the preservation and conservation of public lands and waters. Bucking stereotypes, the group spans the political spectrum, with 33% Independent, 23% Republican, 20% Democrat and 16% unaffiliated in a recent survey. The BHA's recent promotion of the Land and Water Conservation Fund shows that bipartisanship is possible.

Jordan is dealing with an influx of Syrian refugees that are putting a strain on already scarce resources like water. In response, the United Nations World Food Program has started to grow barley and other foods hydroponically in a process that uses 90% less water than traditional methods. Beyond the innovations in the lab, new technology is also allowing refugees to shop freely in local supermarkets and use their irises—checked with eye scans—to pay for their groceries from their given funds. This eliminates the threat of theft and is improving food access across Jordan.

A grass blend formulated specifically for northern Utah’s environment uses at least 30 percent less water than typical turf.

A greenhouse that is cooled by seawater and the wind is allowing farmers in Somaliland to grow crops like tomatoes and vegetables despite extreme heat. By creating an environment that is higher in humidity and cooler in temperature, plants don’t need to drink as much water — almost 10 times less water because of the cooling system. There are challenges to scaling the response, but these greenhouses offer farmers the potential to increase their revenue in Africa.

Lamakani, a small village in India, went barren and townspeople completely depended on water tankers after a drought in the 90s. One leader initiated a watershed movement. They applied a series of approaches which included things like watershed development, bans on grass grazing and tree falling, and collaborating with local artists to communicate messages of conservation. Now, the town is lush again.