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3) Acid Mud
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English
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In many wetlands along the Murray and Darling Rivers, the recipe for acid mud is perfect. Sediments flooded for decades are being exposed to air as drought affected water levels fall. Waterlogged soils often contain sulfides produced by bacteria decomposing organic matter, but if these sediments are allowed to build up and are then exposed to oxygen, they form sulfuric acid. This video clip focuses on the problem of Bottle Bend, a once healthy wetland...
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"Land examines in depth how we determine where the land lies, how we acquire it, how we steward it, how and why we fight over it, and, finally, how we can, and on occasion do, come to share it. Ultimately, Winchester confronts the essential questions: who actually owns the world's land, how much of it do we really need, and why does it matter?" -- Inside front jacket flap.
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Bali's iconic rice terraces, clinging to the steep slopes of active volcanoes that dominate the island, are the oldest continuous irrigation system on Earth. This video segment takes a look at the unique combination of religion and rice cultivation that has created a cooperative self-governing water-sharing system that involves tens of thousands of people. While this ancient hydro-culture has weathered natural change for more than a millennium, the...
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The Next, Best West explores our changing relationship with the land that sustains us. It tells the story of how the conventional American concept of progress has steered our exploitation of the Western landscape, and takes you to three places - Colorado's San Luis Valley, the high plains of eastern Montana and the Elwha River on Washington's Olympic Peninsula - where a vibrant new understanding of progress presages a better future.
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Nematodes, or roundworms, are highly adaptable multicellular survivors of many diverse ecologies. From an agricultural perspective, nematodes are often detrimental: they are pests that attack plants and spread viruses, causing a global crop yield loss of $125 billion annually. This 2009 Falling Walls lecture video features the research of Waceke Wanjohi, who has taught nematology for 20 years, developing academic programs and labs while publishing...
13) Concrete Jungle
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English
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The world's cities are growing at a faster rate than ever before. An estimated 75 million people around the world move to an urban area every year. And as our metropolises become more and more crowded, architects, designers and builders face a constant challenge: How to create new and modern spaces in cities where every square-inch has already been developed.
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The Great Lakes basin is a melting pot of tradition and history. The same waters that nourish the region's wildlife have also shaped the customs of the people who live along its shores. Join us for a survey of the Great Lakes and the fascinating people and wildlife that surround them. We'll engage with cleanup efforts to keep the lakes healthy and vital, and will also take up an investigation into the sinking of the ship the Edmund Fitzgerald. A diverse...
18) Australia
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Jimmy Doherty visits the wheat belt of western Australia in this program to see if farmers there can overcome the global problem of soil salinity. Next, he heads deep into the outback to catch wild animals - then takes a trip to the Murray-Darling river basin to see if its vineyards can still produce good wine despite now having only half as much water as in the past.
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Clean water is essential for human existence. However, international requirements are not met by the available supply. This program examines rising global water demand and some of the serious issues with inadequate and/or contaminated water supplies. Incorporating a range of water management case studies from various parts of the world, this video is an ideal resource for students of geography and environmental science.
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English
Description
Water is essential for life – it provides plants with the ability to create sugar for food and it helps humans regulate body temperatures while nourishing and protecting the brain, spinal cord and other tissues. Water is equally important to the environment due to the intricate balance of the water cycle. This program takes an in-depth look at the chemistry of water, its different states, and how each of them affects the world around us.