The Great Man-Made River Project: Libya’s Achievement

September 1st is the anniversary of an event little known in the West. Today, over twenty years on, the people who deserve to be celebrating it, are instead enduring a war. Yet the achievement changed their lives greatly and merits recognition. A tap was turned on in Libya. From an enormous ancient aquifer, deep below the Sahara Desert, fresh water began to flow north through 1200 kilometres of pipeline to the coastal areas where 90% of Libyan people live, delivering around one million cubic metres of pure water per day to the cities of Benghazi and Sirte. Crowds gathered in the desert for the inaugural ceremony. Phase I of the largest civil engineering venture in the world, the Great Man-made River Project, had been completed. It was during the 1953 search for new oilfields in southern Libya that the ancient water aquifers were first discovered, four huge basins with estimated capacities each ranging between 4,800 and 20,000 cubic kms. Yes, that’s cubic kilometres. There is so much water that Libya had recently also offered it to Egypt for their needs.

After the bloodless revolution of 1969, also on September 1, the new government nationalised the oil companies and spent much of the oil revenues to harness the supply of fresh water from the desert aquifers by putting in hundreds of bore wells. Muammar Gaddafi’s dream was to provide fresh water for everyone, and to turn the desert green, making Libya self-sufficient in food production. He established large farms and encouraged the people to move to the desert. But many preferred life on the coast and wouldn’t go. So Gaddafi next conceived a plan to bring the water to the people. Feasibility studies were carried out by the Libyan government in the seventies and in 1983 the Great Man-made River Authority was set up. The project began the following year, fully funded by the Libyan government. The almost $30 billion cost to date has been without the need of any international loans. Nor has there been any charge on the people, who do not pay for their reticulated water, which is regarded in Libya to be a human right and therefore free.GMMRP figures are staggering. The ‘rivers’ are a 4000-kilometre network of 4m diameter lined concrete pipes, buried below the desert sands to prevent evaporation. There are 1300 wells, 500,000 sections of pipe, 3700 kms of haul roads, and 250 million cubic metres of excavation. All material for the project was locally manufactured. Large reservoirs provide storage, and pumping stations control the flow into the cities. The pipeline first reached Tripoli in 1996 and when Phase V is completed, the water will allow about 155,000 hectares of land to be cultivated. To achieve all this, construction work was tendered and many overseas companies, including from US, Korea, Turkey, Britain, Japan and Germany took up contracts for each Phase, and some have worked for decades in Libya. The project has not been without problems, including faulty materials and financial difficulties within some of the contracting firms. Since the NATO air attacks on Libya began in March, most foreign nationals have returned home, including those employed on the hydro scheme. The final phase of the Great Man-made River Project is stalled.Libyan people put their hearts into work on the GMMR from the beginning, and years ago took on most of the managerial and technical positions as their expert knowledge increased, with government policy encouraging their education, training and employment. They proudly call the GMMRP “the eighth wonder of the world.”(UN Human Development Index figures for Libya since the beginning of Gaddafi’s influence can be found here http://bit.ly/b4ItsI )The project was so well recognised internationally that UNESCO in 1999 accepted Libya’s offer to fund an award named after it, the Great Man-Made River International Water Prize, the purpose of which is to “reward remarkable scientific research work on water usage in arid areas”. http://bit.ly/rnxiCf Gaddafi was often ridiculed in the West for persevering with such an ambitious project. Pejorative terms such “pipedream”,“pet project” and “mad dog” appeared in UK and US media. Despite a certain amount of awe for the enormity of the construction, the Great Man-made River was often dismissed as a “vanity project” and then rarely mentioned in western media. But truth is, it’s a world class water delivery system, and often visited by overseas engineers and planners wanting to learn from Libyan expertise in water transfer hydro-engineering.

Source: www.scoop.co.nz

Ocean Acidification Will Make Climate Change Worse

Given that they cover 70% of the Earth’s surface—and provide about 90% of the planet’s habitable space by volume—the oceans tend to get short shrift when it comes to climate change. The leaked draft of the forthcoming coming new report from the Intergovernmental Panel on Climate Change highlighted the atmospheric warming we’re likely to see, the rate of ice loss in the Arctic and the unprecedented (at least within the last 22,000 years) rate of increase of concentrations of greenhouse gases like carbon dioxide and methane. But when it came to the oceans, press reports only focused on how warming would cause sea levels to rise, severely inconveniencing those of us who live on land.

Some of that ignorance is due to the out of sight, out of mind nature of the underwater world—a place human beings have only seen about 5% of. But it has more to do with the relative paucity of data on how climate change might impact the ocean. It’s not that scientists don’t think it matters—the reaction of the oceans to increased levels of CO2 will have an enormous effect on how global warming impacts the rest of us—it’s that there’s still a fair amount of uncertainty around the subject.

But here’s one thing they do know: oceans are absorbing a large portion of the CO2 emitted into the atmosphere—in fact, oceans are the largest single carbon sink in the world, dwarfing the absorbing abilities of the Amazon rainforest. But the more CO2 the oceans absorb, the more acidic they become on a relative scale, because some of the carbon reacts within the water to form carbonic acid. This is a slow-moving process—it’s not as if the oceans are suddenly going to become made of hydrochloric acid. But as two new studies published yesterday in the journal Nature Climate Change shows, acidification will make the oceans much less hospitable to many forms of marine life—and acidification may actually to serve to amplify overall warming.

The first study, by the German researchers Astrid Wittmann and Hans-O. Portner, is a meta-analysis looking at the specific effects rising acid levels are likely to have on specific categories of ocean life: corals, echinoderms, molluscs, crustaceans and fishes. Every category is projected to respond poorly to acidification, which isn’t that surprising—pH, which describes the relative acidity of a material, is about as basic a function of the underlying chemistry of life as you can get. (Lower pH indicates more acidity.) Rapid changes—and the ocean is acidifying rapidly, at least on a geological time scale—will be difficult for many species to adapt to.

Corals are likely to have the toughest time. The invertebrate species secretes calcium carbonate to make the rocky coastal reefs that form the basis of the most productive—and beautiful—ecosystems in the oceans. More acidic oceans will interfere with the ability of corals to form those reefs. Some coral have already shown the ability to adapt to lower pH levels, but combined with direct ocean warming—which can lead to coral bleaching, killing off whole reefs—many scientists believe that corals could become virtually extinct by the end of the century if we don’t reduce carbon emissions.

The Nature Climate Change study found that mollusks like oysters and squids will also struggle to adapt to acidification, though crustaceans like lobsters and crabs—which build lighter exoskeletons—seem likely to fare better. With fish it’s harder to know, though those species that live among coral reefs could be in trouble should the coral disappear. But ultimately, as the authors point out, “all considered groups are impacted negatively, albeit differently, even by moderate ocean acidification.” No one gets out untouched.

The other Nature Climate Change study—by American, German and British researchers—looked at the effects that ocean acidification could have on atmospheric warming. It turns out there may be some feedback—the researchers found that as the pH of the oceans dropped, it would result in lower concentrations of the biogenic sulfur compound dimethylsulphide (DMS). Why does that matter? Marine emissions of DMS are the largest natural source of atmospheric sulfur. (Manmade sources of sulfur include the burning of coal.)

Sulfur, in the form of sulfur dioxide, isn’t a greenhouse gas. But higher levels of sulfur in the atmosphere can reduce the amount of solar energy reaching the Earth’s surface, causing a cooling effect. (In the aftermath of the eruption of Mt. Pinatubo in the Philippines in 1991, which threw millions of tons of sulfur dioxide into the atmosphere, average global temperatures the two years fell by about 0.5 C.) If acidification decreases marine emissions of sulfur, it could cause an increase in the amount of solar energy reaching the Earth’s surface, speeding up warming—which is exactly what the Nature Climate Change study predicts. It’s one more surprise that the oceans have in store for us.

Source:: http://science.time.com

10 Reasons Why Your Lawn Isn’t Eco-Friendly

We like our lawns. Well-kept lawns are a status symbol of wealth and leisure. The first-known usage of the word “lawn” dates back to the 14th century. We have had a long love-affair with our green spaces—no wonder we find them so aesthetically pleasing to the eye. Believed to have started in Medieval times as grassed enclosures for communal livestock—lawns became popular with European aristocracy (thus beginning the association with wealth) who had the means—and labor—to take care of them (at that time there were no lawn mowers—the first mower being invented in 1827). Lawns became recreational places in the Tudor and Elizabethan period 1.Did you know that lawn coverage in the U.S. is estimated to be 46.5 million acres? That’s an area larger than the states of Pennsylvania, Delaware, and Rhode Island combined 2. That spells bad news for the environment, especially when you consider the following facts: In the U.S., 17M gallons of gas and oil are spilled every year from garden equipment. Valdez only spilled 11M gallons. Lawn mowers use 800 million gallons of gasoline each year. An hour’s use of a conventional lawn mower pollutes as much as driving a car 100 miles. 60% -70% of clean drinking water is used to water lawns. Studies show that up to 60% of synthetic nitrogen applied to lawns ends up contaminating ground water. A typical lawn gets 2x more water than it needs to remain healthy. Watering our lawns uses 8,000,000,000 gallons of water each day. An average lawn uses 264 gallons of water EACH HOUR. Run off from lawns adds 20% of water pollution, creating dead zones in our waterways. Not only are lawns a waste of natural resources, lawns are a financial drain for the picky homeowner. American homeowners send $6.4 billion a year making sure that the grass is always greener on their side of the fence. $5.25 billion of that is spent on fossil fuel based fertilizers and $700 million is spent on pesticides2. Luckily, there are ways to make your lawn more eco-friendly. We are going to look at some of those options in a later post. Stay tuned! 1. http://en.wikipedia.org/wiki/Lawn#History 2. http://landscapeforlife.org/plants/3f.php 3. http://eartheasy.com/grow_lawn_care.htm