Union of Concerned Scientists
The Union of Concerned Scientists puts rigorous, independent science to work to solve our planet's most pressing problems. Joining with people across the country, we combine technical analysis and effective advocacy to create innovative, practical solutions for a healthy, safe, and sustainable future.
What is Climate Engineering? - Union of Concerned Scientists
Nov 6, 2017 · Types of climate engineering . Some carbon dioxide removal techniques (CDR), like reforestation, are well-understood. Others entail using technologies to capture and sequester carbon dioxide that are in early research stages or currently are difficult to deploy at large scales without high costs or substantial negative impacts on energy use, water or land.
Ten Signs of Global Warming | Union of Concerned Scientists
Apr 4, 2017 · 2. Ocean temperatures are increasing . Earth’s oceans have an incredible capacity to absorb and store heat. The top half-mile of most major ocean waters is getting significantly warmer, and the frequency, duration, extent, and severity of marine heatwaves is increasing. Rising ocean heat content also alters patterns of ocean circulation, which have far-reaching …
Environmental Impacts of Geothermal Energy - Union of …
Mar 5, 2013 · Air emissions. The distinction between open- and closed-loop systems is important with respect to air emissions. In closed-loop systems, gases removed from the well are not exposed to the atmosphere and are injected back into the ground after giving up their heat, so air emissions are minimal.
Top 10 Benefits of Climate Action - Union of Concerned Scientists
Oct 2, 2009 · Climate change is one of the most urgent issues of our day. Several recent studies show that acting quickly and decisively to address this challenge and shift our economy to clean energy will bring significant benefits to the United States—while also helping us avoid some of the worst consequences of unchecked global warming.
Environmental Impacts of Wind Power - Union of Concerned …
Mar 5, 2013 · Wildlife and habitat. The impact of wind turbines on wildlife, most notably on birds and bats, has been widely document and studied. 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 …
The Ozone Hole and Global Warming - Union of Concerned …
Jul 16, 2008 · Human activities cause ozone depletion and global warming. Ozone (O 3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.. Global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural …
Nuclear Weapons Solutions - Union of Concerned Scientists
Roughly 9,500 nuclear weapons are hidden away in bunkers and missile siloes, stored in warehouses, at airfields and naval bases, and carried by dozens of submarines across the world. A single warhead can demolish a city center. A full-fledged nuclear war would threaten life as we know it. But with ...
Environmental Impacts of Solar Power - Union of Concerned …
Mar 5, 2013 · The sun provides a tremendous resource for generating clean and sustainable electricity without toxic pollution or global warming emissions. The potential environmental impacts associated with solar power—land use and habitat loss, water use, and the use of hazardous materials in manufacturing—can vary greatly depending on the technology, which …
Satellite Database | Union of Concerned Scientists
Dec 8, 2005 · Satellite quick facts. Includes launches through 5/1/2023. Total number of operating satellites: 7,560. United States: 5,184; Russia: 181; China: 628; Other: 1,572