But it’s more widely known as “rock snot”—mats of algae carpeting the bottoms of some rivers and lakes—and it’s quickly spreading around the globe, possibly because of climate change, a new study says.

So far, scientists say its effects on the environment are unknown, though they are concerned specifically about the impact on salmon.

The mats can cover up to 75 percent of a river bottom in some places. (See a striking picture of didymo coating a river bottom.)

As the algae spread worldwide in recent decades, including to New Zealand, South America, and the United States, scientists theorized that it was an invasive organism whose cells were hitchhiking with people as they enjoyed the outdoors.

Not so, found Joshua Kurek, a biologist at Queen’s University in Ontario, Canada, and his colleagues. Read more

A Clean Water Crisis

The water you drink today has likely been around in one form or another since dinosaurs roamed the Earth, hundreds of millions of years ago.

While the amount of freshwater on the planet has remained fairly constant over time—continually recycled through the atmosphere and back into our cups—the population has exploded. This means that every year competition for a clean, copious supply of water for drinking, cooking, bathing, and sustaining life intensifies.

Water scarcity is an abstract concept to many and a stark reality for others. It is the result of myriad environmental, political, economic, and social forces. Read more

Yesterday, nations went to war for land. Today, our conflicts involve energy. And tomorrow, Brahma Chellaney writes, the battles will be about water. The award-winning author believes that Mark Twain was right when he said, “Whisky is for drinking, water is for fighting over.”

There is “blue water,” “green water,” even “virtual water.” But however labeled, water is the world’s single most important resource. Life is not possible without it. It will likely determine our future.

And it is becoming scarce. In the twentieth century, the world’s population grew by a factor of 3.8 and water use by nine. Today, with the number of people passing the seven billion mark, it should come as no surprise that more than half of humankind lives in water-stressed areas. That figure could increase to two-thirds during the next decade. Read more

And not even just from waste, but from human waste! Bill Gates makes a lot for the development of this trend. He is actively promoting his new creation, Omniprocessor, which overcome Microsoft, the most successful business of the billionaire in a very near future.

Water from everything. Bill Gates has been invo lved in charity work for a long time. And most of all he helps people from the third world countries. One of the main problems there is a shortage of drinking water. That’s the direction where the former IT tycoon has turned. Read more