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Climate change is threatening the survival of the polar bears in the Arctic. Humans can take action to help reduce the negative effects of climate change and preserve the polar bears' habitat. In this episode, students learn a variety of energy-saving tips to help them reduce energy consumption in an effort to reduce the effects of global warming. Part of the "Saving a Species" series.
(Source: DCMP)
Discusses some of the biggest problems facing the environment today and how it is being abused. Provides an overview of the role of the greenhouse effect, carbon emissions, air pollution, and how the burning of the rainforest affects global warming. Explains the "carbon footprint" and outlines an experiment with acid rain. Shows how much water and unnecessary packaging material people use every day. Details how people can "refuse, reuse, and recycle," contributing to a healthier Earth.
One of the areas that is most sensitive to climatic change is human health. Climate change affects human health in numerous ways. Some are immediate, and others may not manifest until future generations inhabit earth. Global areas have already begun to suffer the effects of ecosystem alterations and limited water sources. These situations also impact crop production and food distribution. Researchers also predict an increase in the number of displaced persons as the planet warms and sea levels begin to rise. Chapter 10 of Air: Climate Change Series.
Whether they arise from human causes or forces within planet Earth itself, natural disasters threaten life and civilization with what seems to be growing frequency. Studies troubling developments in marine, arctic, wetland, and urban environments while highlighting research opportunities that may help prevent future catastrophes. Coral reef decay, Everglades habitat loss, polar ice disappearance, and global warming are all analyzed. Looks at earthquake prediction, hurricane and tornado tracking, air pollution monitoring, tsunami warning systems, and the cleanup of toxic flood sediment in New Orleans.
Energy has been essential for the development of human activities from the Industrial Revolution to present day. Over the course of history, human consumption of energy has increased significantly. Currently, society depends largely on nonrenewable energies that come from fossil fuels. However, the increase in greenhouse gas emissions has highlighted the need to change from fossil fuels to renewable energy sources that reduce environmental contamination. Many industries are committing to the development of alternative energy sources that don’t contribute to global warming. Chapter 9 of Air: Climate Change Series.
Mars is the planet in our solar system most similar to Earth. Rumors of life on it may be substantiated as NASA orbiters and rovers discover new evidence of frozen water just beneath the rusty soil. Did alien life exist there? As Earth reels with the effects of global warming, Mars becomes the most likely candidate for eventual human habitation. Cutting-edge computer graphics are used to show what life would be like on Mars, and to imagine what kind of life forms might evolve in alien atmospheres.
David Stahle travels to ancient forests around the world, collecting tree rings to learn more about major climate and historical events dating back hundreds and thousands of years. With help from the National Science Foundation, he uses dendrochronology, or tree-ring dating, to get a snapshot of climate change over time. Stahle runs the Tree-ring Lab at the University of Arkansas, where he and fellow tree-ring researchers are learning that a trend of global warming began in the 1800s and continues today, brought about by changes in tropical sea surface temperatures of no more than a few tenths of a degree Celsius. Today Stahle is working with hydrologists and government planners in California and throughout Mexico to plan for drought and climate change events.
As shown on the History Channel. In the remote wastes of Siberia buried under snow are the remains of one of the greatest catastrophes that the Earth has endured. 250 million years ago, huge volumes of lava spewed out onto the surface--so much that it would have buried the whole of Texas under one mile of lava. At first the temperature dipped but then the greenhouse gases that escaped from the depressurized lava caused a massive global warming. It wreaked havoc, and 95% of the species on Earth became extinct. Yet life hung on and in time this disaster paved the way for the next phase of life on earth--the age of the dinosaurs.
The reefs around Jamaica, once the most famous in the world, are now struggling just to survive. Local fishermen have to work much harder to make a living. They team up with conservationists, the Jamaican government, and scientists to establish a fishing sanctuary, hoping to restore their endangered fishery. Part of the "Global Reef Expedition" series.
Situated at the meeting of major currents, the Galapagos Islands are not tropical, but in fact they are cold. Reefs around the islands were only discovered in 1975. With the help of a local guide, the team battles rough seas and cold water to explore the reefs. They discover some flourishing reefs at Darwin Island. Part of the "Global Reef Expedition" series.
The scientific team visits the Chagos Archipelago, a tropical paradise with some of the healthiest coral reefs on the planet. They want to study reefs seemingly untouched by man but instead become witnesses to a bleaching incident that transforms the reefs right before their eyes. Part of the "Global Reef Expedition" series.
The people of the Cook Islands have created one of the world’s largest marine parks, and now they are working together to figure out what that means to a bevy of conflicting interests, from fishermen to miners. The scientists lend their expertise and help the residents map their resources. Part of the "Global Reef Expedition" series.
This episode explores one of the largest barrier reefs in the world, which stretches for nearly a thousand miles in the Caribbean Sea. Working together with local scientists and conservation workers, the research team documents the reefs in the Bahamas and probes their ability to cope with the perils of climate change. Part of the "Global Reef Expedition" series.
The team settles in for a month on the Great Barrier Reef, the largest reef in the world. One scientist is studying sharks, while another group explores the northern portion of the reef. The team discovers bleaching and severe die-off among corals at the reef. Part of the "Global Reef Expedition" series.
Eco, the little bear, travels around the world observing human interactions with the environment. During his journey, he meets many other friends from the animal kingdom and gets a firsthand look into some of the environmental and social problems facing the planet. Eco and his friends provide ways for humans to ensure a healthy planet for the future. Part of "Eco S.O.S." series.
A team of veterinarians travel to Cambodia to support wild animal rescue and emergency care efforts for tigers and elephants. Join the team as they study exotic Asian tigers and provide expertise as an orphaned elephant baby receives a prosthetic leg. Part of "The Wildlife Docs" series.
One of the consequences of accelerating climate change is the alteration of rainfall patterns. This alteration is causing flash floods and severe drought in several global areas. The increase in droughts and flash floods is a source of global social problems and economic loses. Chapter 7 of Air: Climate Change Series.
Currently, cities have a fundamental role in the struggle against climate change and harmful environmental practices. But, at the same time, major global cities consume more than two thirds of the world’s energy and release seventy percent of the global emissions of carbon dioxide. Climate change has become part of the worldwide agenda for major cities as they develop policies and practices to protect the environment and reduce greenhouse gas emissions. Chapter 2 of Air: Climate Change Series.
Chemistry is the science of interacting particles and the various states of matter. Developing a better understanding of the atomic model through experiments with gases, scientists discovered the Ideal Gas Law, developed phase diagrams, and learned about the properties of supercritical fluids. Today's chemists are exploring new ways to control the interactions of atoms, with the goal of making better hydrogen-powered cars and new technologies for the long-term, underground storage of carbon dioxide to reduce greenhouse warming. Part of the series Chemistry: Challenges And Solutions.
Scientists and researchers are working to understand the possible effects of Antarctic ice melt on global processes. Some areas that might be impacted include currents, water chemistry, and biological balance.
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