By The Editors The theme of the 2013 World Day to Combat Desertification is drought and water scarcity. Freshwater is valuable. Of all the water on Earth, only 2.5 per cent is freshwater. And of all this freshwater, the total usable supply for ecosystems and humans is less than 1 per cent. When demand for water exceeds available supply, it results in water scarcity. This is why the World Economic Forum, in their Global Risk Report 2013, suggests that decreasing water supply is among the top five risks, both by likelihood and impact, that humanity faces over the next ten years. Increasing water scarcity and drought, in part as a result of climate change, will…