Bill de Blasio, right, with his wife and children, was sworn into office at City Hall on Wednesday by former President Bill Clinton.  Chang W. Lee/The New York Times

nytimes.com - by MICHAEL M. GRYNBAUM - January 1, 2014

Bill de Blasio, whose fiery populism propelled his rise from obscure neighborhood official to the 109th mayor of New York, was sworn into office on Wednesday, pledging that his ambition for a more humane and equal metropolis would remain undimmed.

In his inaugural address, Mayor de Blasio described social inequality as a “quiet crisis” on a par with the other urban cataclysms of the city’s last half-century, from fiscal collapse to crime waves to terrorist attacks, and said income disparity was a struggle no less urgent to confront.

“We are called to put an end to economic and social inequalities that threaten to unravel the city we love,” he said to about 5,000 people at the ceremony, many beneath blankets on a numbingly cold day.

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Watch how geothermal heat pumps heat and cool buildings by concentrating the naturally existing heat contained within the earth -- a clean, reliable, and renewable source of energy.

energy.gov - June 24, 2012

Geothermal heat pumps (GHPs), sometimes referred to as GeoExchange, earth-coupled, ground-source, or water-source heat pumps, have been in use since the late 1940s. They use the constant temperature of the earth as the exchange medium instead of the outside air temperature. This allows the system to reach fairly high efficiencies (300% to 600%) on the coldest winter nights, compared to 175% to 250% for air-source heat pumps on cool days.

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