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the air on the outside. in certain areas, the sunlight is strong enough and long enough to provide for a majority, if not entirety, of the necessary heat. in other areas, however, a significant amount of heat must be generated to keep the greenhouse at a suitable temperature. in these houses, natural gas
, bottled gas, heating coils, heating fans, a central heating system, or some other method is employed to provide the necessary heat. for smaller greenhouses harboring more basic crops, a simple thermostat is all that's necessary in order to regulate the temperature. for larger greenhouses or those housing...
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