White House. Washington, D.C. White House, formerly known as the Executive Mansion (1810â1902), the official office and residence of the president of the United States at 1600 Pennsylvania Avenue N.W. in Washington, D.C. The White House and its landscaped grounds occupy 18 acres (7.2 hectares).
Quick Answer. Ecological balance is a theory stipulating that natural conditions, including numbers of various animal and plant species, remain stable on their own through variations over time.
Ecological Solutions Group LLC (ESG) helps the owners of large-scale lands, including the United States (U.S.) federal government, understand and manage their wetlands, rangelands, forests and streams. We analyze the condition of vegetation, soils, water and wildlife on client holdings.