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  2. Here are most and least environmentally friendly states - AOL

    www.aol.com/most-least-environmentally-friendly...

    Story at a glance Personal finance site WalletHub released a study ranking the 50 states on three factors — environmental quality, eco-friendly behaviors and climate change contributions.

  3. Outdoor wood-fired boiler - Wikipedia

    en.wikipedia.org/wiki/Outdoor_wood-fired_boiler

    Outdoor wood boilers are a topic of environmental controversy. [5] An improperly used or built outdoor wood boiler can produce wood smoke with excessive unburned particulate matter, but when properly burned, studies show that burning wood is still one of the most environmentally friendly heating options. In 2007, EPA began a voluntary program ...

  4. Sustainable energy - Wikipedia

    en.wikipedia.org/wiki/Sustainable_energy

    The environmental dimension of sustainability includes greenhouse gas emissions, impacts on biodiversity and ecosystems, hazardous waste and toxic emissions, [7] water consumption, [9] and depletion of non-renewable resources. [6] Energy sources with low environmental impact are sometimes called green energy or clean energy. The economic ...

  5. Energy conservation - Wikipedia

    en.wikipedia.org/wiki/Energy_conservation

    Low-power or insulated versions of these devices give off less heat for the air conditioning to remove. The air conditioning system can also improve efficiency by using a heat sink that is cooler than the standard air heat exchanger, such as geothermal or water. In cold climates, heating air and water is a major demand for household energy use.

  6. Economy of Indiana - Wikipedia

    en.wikipedia.org/wiki/Economy_of_Indiana

    In 2010, the Indiana Heating and Air-Conditioning Incentive Program (IHIP) provides rebates of up to $1000 for the purchase and installation of Energy Star-rated geothermal heat pumps. [ 25 ] One of the largest geothermal heat pump systems in the United States is a GeoExchange pond coupled loop system by Geothermal Design Associates at the St ...

  7. Passive house - Wikipedia

    en.wikipedia.org/wiki/Passive_house

    A maximum air temperature of 50 °C (122 °F) is applied, to prevent any possible smell of scorching from dust that escapes the filters in the system. Beyond the recovery of heat by the heat recovery ventilation unit, a well-designed passive house in the European climate should not need any supplemental heat source if the heating load is kept ...

  8. Indiana weather can't make up its mind. Here's how to make ...

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  9. Sustainability at American colleges and universities - Wikipedia

    en.wikipedia.org/wiki/Sustainability_at_American...

    Ball State University, located in Indiana, started using geothermal energy in place of 4 coal fired burners in 2009. The new system will save them an estimated $2 million a year. [24] They are the first University to build a geothermal system of this size; 50 buildings spread over 660 acres of campus are being heated by this system.

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