1. use only the local geothermal sources is . 2. Cause a stink because gas 3. There is a component that is a toxic gas, corrosive gas and gas H2S hydrogen sulfide gas (H2S) ammonia (NH3) gas and radon (Radon) .
One. Available only local sources. geothermal is only 2. Cause the smell of gas. 3. Contain a toxic gas And corrosive gases such as hydrogen sulfide (H2S), ammonia (NH3) and radon (Radon)