UNICEF said the 200 million hours women and girls spend every day collecting water is a colossal waste of their valuable time.
As drought sweeps many countries in Africa, an initiative led by water NGOs supports the use of underground aquifers. But the idea is controversial
People have been harnessing water to produce energy and perform work for thousands of years. The ancient Greeks used watermills to grind wheat into flour. Ancient Romans used the power of water to cut timber and stone.
Television pictures showed villagers wading waist deep in floodwaters with their livestock, mud-and-brick homes collapsing and people climbing into wooden boats
Hundreds of thousands of small farmers in Bangladesh are shifting their fields to high value crops like fruit and flowers to meet growing demand and leave subsistence farming behind.