Tuesday, April 17, 2012

Are We Running Out of Water? World Water Crisis 101 (Part 1)

All the Water on Earth

Ours is often referred to as the blue planet because 70 percent of the Earth’s surface is covered by water. Yet, scientists and public officials predict a global water crisis within the next few decades. Worldwide 2.7 billion people are currently affected by water shortages and, by 2025, and two-thirds of the world’s population could be living under water stressed conditions.
There are two primary components of water availability: quantity and quality.
Quantity: The Earths Drinkable Freshwater Supply is Limited

Only 2.5 percent of the water on earth is theoretically drinkable and the vast majority of that freshwater is inaccessible, either deep below the earth’s surface or in glaciers and snowfields at the poles. As climate change shifts rainfall and drought patterns around the world, more and more people are living in water stressed conditions.

According to the WorldWatch Institute, “some 20 percent of the increase in water scarcity in the coming decades will be caused by climate change … In poor countries, the consequences of climate change could be dire – erratic weather patterns have already been the primary cause of famine for millions around the world.”

Water Scarcity Around the World

China – Chronic drought in north China is pushing the Gobi Desert into farmland that feeds China’s megacities Beijing and Tianjin and the Yellow River, “the so-called birthplace of Chinese civilization, is so polluted it can no longer supply drinking water.”

AfricaIn sub-Saharan Africa, only 61 percent of inhabitants have access to safe drinking water sources. This compares with 90 percent or more in Latin America and the Caribbean, northern Africa, and large parts of Asia. In poorer countries, lack of water access is often due to lack of infrastructure. While much wealthier than most sub-Saharan countries, Egypt still suffers from water scarcity. The country imports more than half of its food because it does not have enough water to grow it domestically.

Island Nations – Drinking water is one of the many climate change concerns of island nations. On the Pacific Island of Tuvlala, water was rationed to just two buckets a day during a prolonged drought in 2011. During the worst of the drought, New Zealand and Australia provided “rehydration packets” to prevent a humanitarian crisis.

Australia – But Australia has its own water woes. Climate change may be intensifying the continent’s natural drought cycle. At the same time, extreme weather events such as last fall’s record flooding that inundated Melbourne may become more frequent.


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