Benefits of Renewable Energy Use - Union of Concerned Scientists
2008年7月14日 · Using more renewable energy can lower the prices of and demand for natural gas and coal by increasing competition and diversifying our energy supplies. And an increased reliance on renewable energy can help protect consumers when fossil fuel prices spike. Explainer. Renewables face major obstacles.
Environmental Impacts of Renewable Energy Technologies
The environmental impacts associated with solar power can include land use and habitat loss, water use, and the use of hazardous materials in manufacturing, though the types of impacts vary greatly depending on the scale of the system and the technology used—photovoltaic (PV) solar cells or concentrating solar thermal plants (CSP). Explainer.
Environmental Impacts of Wind Power - Union of Concerned …
2013年3月5日 · A recent National Wind Coordinating Committee (NWCC) review of peer-reviewed research found evidence of bird and bat deaths from collisions with wind turbines and due to changes in air pressure caused by the spinning turbines, as well as from habitat disruption. The NWCC concluded that these impacts are relatively low and do not pose a threat ...
Satellite Database | Union of Concerned Scientists
2005年12月8日 · Kyle Ann Sebastian. Assembled by experts at the Union of Concerned Scientists (UCS), the Satellite Database is a listing of the more than 7,560 operational satellites currently in orbit around Earth. Our intent in producing the database is to create a research tool for specialists and non-specialists alike by collecting open-source information ...
Car Emissions & Global Warming - Union of Concerned Scientists
2014年7月18日 · Our personal vehicles are a major cause of global warming. Collectively, cars and trucks account for nearly one-fifth of all US emissions, emitting around 24 pounds of carbon dioxide and other global-warming gases for every gallon of gas. About five pounds comes from the extraction, production, and delivery of the fuel, while the great bulk of heat-trapping …
Environmental Impacts of Solar Power - Union of Concerned …
2013年3月5日 · Most estimates of life-cycle emissions for photovoltaic systems are between 0.07 and 0.18 pounds of carbon dioxide equivalent per kilowatt-hour. Most estimates for concentrating solar power range from 0.08 to 0.2 pounds of carbon dioxide equivalent per kilowatt-hour. In both cases, this is far less than the lifecycle emission rates for natural ...
The Ozone Hole and Global Warming - Union of Concerned …
2008年7月16日 · The term ‘ozone hole’ refers to the depletion of the protective ozone layer in the upper atmosphere (stratosphere) over Earth's polar regions. People, plants, and animals living under the ozone hole are harmed by the solar radiation now reaching the Earth's surface—where it causes health problems, from eye damage to skin cancer.
Are Humans the Major Cause of Global Warming? | Union of …
2009年7月14日 · The scientific consensus. Within the scientific community, there is essentially no disagreement on the causes of climate change. Multiple studies have shown that at least 97 percent of scientists agree that global warming is happening and that human activity is the primary cause. Major scientific assessments also agree.
Environmental Impacts of Hydroelectric Power
2013年3月5日 · Global warming emissions are produced during the installation and dismantling of hydroelectric power plants, but recent research suggests that emissions during a facility’s operation can also be significant. Such emissions vary greatly depending on the size of the reservoir and the nature of the land that was flooded by the reservoir.
Coal and Air Pollution | Union of Concerned Scientists
2008年7月28日 · This air pollution includes: Mercury: Coal plants are responsible for 42 percent of US mercury emissions, a toxic heavy metal that can damage the nervous, digestive, and immune systems, and is a serious threat to the child development. Just 1/70th of a teaspoon of mercury deposited on a 25-acre lake can make the fish unsafe to eat.