California: water is a precious resource | Photo: William Warby/Creative Commons

The California Governor Jerry Brown has backed up standards for water appliances which will save more than 10 billion gallons of water in the first year.

The state's four-year drought has forced drastic decisions. Over time, the water savings is estimated to reach 105 billion gallons per year, i.e., savings of more than three times the annual amount of water used by the City of San Francisco.

"People should realize we are in a new era. The idea of your nice little green lawn getting watered every day, those days are past," underlined Governor Jerry Brown.

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Ocean acidification: coral reefs are particularly sensible | Photo: NOAA/Creative Commons

Do you know what ocean acidification is? Learn why a surf session might become a dangerous or impossible activity in the future.

Oceans cover 70 percent of the earth's surface. When CO2 from the air is absorbed into seawater, it dissolves and becomes carbonic acid.

Over the last couple of centuries, the oceans have absorbed a quarter of the CO2 we've emitted and their average PH has dropped from 8.2 to 8.1, which means a 30 percent increase in acidity.

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Water: liquid gold | Photo: Walter-Wilhelm/Creative Commons

World Water Day is marked on 22 March every year. And there's so much we need to do to save and defend the liquid gold.

Water is part of our lives. In developing countries, we never miss water, but that doesn't mean we have shown total respect for the natural resource. We must learn how to improve our daily practices.

Unfortunately, the world's poorest regions are still struggling to get enough water to survive. We need water to drink, but we also need water for basic hygiene needs and sanitation.

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