Mercury's surface in "enhanced color," a color scheme created to emphasize color differences. This is not what Mercury would look like to the human eye, but by applying mathematical analysis to images, color differences can be accentuated beyond those visible to a person.
Mount Rushmore National Memorial under construction.
The workers had to endure conditions that varied from blazing hot to bitterly cold and windy. Each day they climbed 700 stairs to the top of the mountain to punch-in on the time clock. Then 3/8 inch thick steel cables lowered them over the front of the 500-foot face of the mountain in a "bosun chair." Despite the dangers, no one was killed during the project.
Otters in Glacier Bay National Park and Preserve, Alaska.
The sea otter population of Glacier Bay has increased dramatically in the past 20 years. Ecologists consider sea otters a keystone species here. Otters consume vast quantities of clams, urchins, crabs, and other invertebrates and their presence creates ripples through the ecosystem. NPS photo.
Every day someone like you becomes a wildland wildfire fighter, a teacher, a trail-builder, a museum curator, or a park ranger. Discover your opportunities in national parks. Come to play. Come to learn. Come to serve. Develop your environmental leadership skills. Find a job. Be the next generation to preserve and protect these great places.
With more than 80% of Americans living in urban areas, urban parks are more important than ever. The father of American landscape architecture, Frederick Law Olmsted, said of urban parks:
It is one great purpose of the Park to supply to the hundreds of thousands of tired workers, who have no opportunity to spend their summers in the country, a specimen of God's handiwork that shall be to them, inexpensively, what a month or two in the White Mountains or the Adirondacks is, at great cost, to those in easier circumstances.
Interior, Energy and Army Corps of Engineers Sign Memorandum of Understanding on Hydropower
Last edited 4/25/2016
WASHINGTON, DC – Secretary of the Interior Ken Salazar and Secretary of Energy Steven Chu announced today that the two agencies, along with the Army Corps of Engineers, will cooperate more closely and align priorities to support the development of environmentally sustainable hydropower.
They signed a Memorandum of Understanding (MOU) that represents a new approach to hydropower development – a strategy that can increase the production of clean, renewable power while avoiding or reducing environmental impacts and enhancing the viability of ecosystems. By signing the MOU, the federal agencies agree to focus on increasing energy generation at federally-owned facilities and explore opportunities for new development of low-impact hydropower.
“While hydropower is the largest source of renewable electricity in the nation, hydropower capacity has not increased significantly in decades,” said Energy Secretary Steven Chu. “As the single largest owner of hydropower generation in the United States, it is important for the federal government to tap this valuable asset so it can continue to contribute to our clean energy portfolio and energy security.”
“As we build our clean energy economy here at home, we must explore and develop new technologies and new strategies for increasing hydropower generation in an environmentally sustainable manner,” said Interior Secretary Ken Salazar. “With better coordination among federal agencies, a common-sense approach, and a focus on low-impact hydropower projects, we can supply more clean power for our economy.”
The MOU aims to increase communication between federal agencies and strengthen the long-term relationship between them to prioritize the generation and development of sustainable hydropower.
Objectives of the MOU include:
Identifying specific federal facilities that will be well-suited as sites for sustainable hydropower;
Upgrading facilities and demonstrating new technologies at existing hydropower locations;
Coordinating research and development on advanced hydropower technologies;
Increasing hydropower generation through low-impact and environmentally sustainable approaches;
Integrating policies at the federal level; and
Collaborating to identify total incremental hydropower resources at federal facilities.
The memorandum is supported by detailed action items that the agencies have identified as areas of collaboration, including Technology Development and Deployment; Green Hydropower Certification; Federal Inland Hydropower Coordination; Renewable Energy Integration and Energy Storage; and Regulatory Process Facilitation.
Today's MOU provides an opportunity for DOE to connect its hydropower research and development efforts with the agencies who own, operate, and regulate federal water projects. The U.S. Army Corps of Engineers and the Department of the Interior's Bureau of Reclamation are the first and second largest hydropower owners in the United States, and their combined facilities represent approximately half of the country's hydropower capacity (close to 34,000 megawatts).
The Department of Energy undertakes research and development to advance the performance and efficiency of hydropower technologies and works to ensure that these technologies are deployed at U.S. hydropower facilities. To learn more about the Department's efforts, please visit: http://windandhydro.energy.gov/water_power.html.
The Department of the Interior's Bureau of Reclamation serves almost 4 million households by annually generating over 40 billion kilowatt hours at 58 power plants and an additional 1,000 megawatts at 71 private power plants. To learn more about the Department's hydropower efforts, please visit: http://www.usbr.gov/power/index.html.