Sulfonamides What are Sulfonamides. Sulfonamides are a group of man-made (synthetic) medicines that contain the sulfonamide chemical group. They are also called sulfa drugs (sometimes spelled as sulpha drugs or sulphonamides). Sulfanilamide was the first sulfonamide developed in 1906, although it was not used as an antimicrobial until the late 1930s.
Steam rising from the Nesjavellir Geothermal Power Station in Iceland. Geothermal energy (from the Greek roots geo, meaning earth, and thermos, meaning heat) is energy made by heat inside the Earth's crust. It's clean and sustainable.Although the Sun does heat the surface of the Earth, heat from inside the Earth is not caused by the Sun.team rising from the Nesjavellir Geothermal Power Station in Iceland. Geothermal energy (from the Greek roots geo, meaning earth, and thermos, meaning heat) is energy made by heat inside the Earth's crust. It's clean and sustainable.
Geothermal energy is a renewable energy source because the heat is continuously produced inside the earth. The word geothermal comes from the Greek words geo (earth) and therme (heat).Geothermal heating units use the earths natural heat to warm and cool your home for sustainable, environmentally friendly comfort.n the winter: The geothermal heat pump extracts heat from the fluid in the earth connection and typically distributes warmed air through a system of air ducts. Cooler air from the building is returned to the heat pump and is re-warmed as it flows through the underground loop. In the summer: The process is reversed.