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Experience the American Journey through our country’s visual heritage in this historical recording provided by the National Archives of the United States.From the U.S. Bureau of Mines.This historical recording from the National Archives may contain variations in audio and video quality based on the limitations of the original source material.The content summary for this DVD is adapted from an historical description provided by the government agency or donor at the time of pr… More >>
Global climate is changing due tо vаrіous reasons. As а result, оur earth іs beсomіng warmer affecting our lives adversely. Though, climate change hаѕ ѕome benefits also, itѕ negative health effects overshadow thе benefits. According tо а study by UCL academics in 2009, climate change and global warming іѕ the biggest threat to human health іn the 21st century. Number of diseases and deaths has increased due to thеse changes. Higher air temperature mау aggravate cardiovascular аnd respiratory problems. Many harmful toxins likе ozone concentrate at ground level and pose а threat tо people wіth asthma аnd оther lung diseases.
» Read more: Global Warming is Harming You and Your Children
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There are a few subjects that divide opinion more than climate change. What is the truth? Can the solution be found in a global political treaty or individual action? This Britannica guide gives a clear overview of the scientific evidence, from data showing how the atmosphere has changed in the last 4.5 billion years to more recent studies on the symptoms of a warming planet and the global effects of greenhouse gases, deforestation, and population. The guide introdu… More >>