Methane On Mars May Indicate Living Planet

Riding with Robots writes “NASA is announcing today that the definitive detection of methane in the Martian atmosphere means the planet is still alive, at least geologically, and perhaps even biologically. ‘Methane is quickly destroyed in the Martian atmosphere in a variety of ways, so our discovery of substantial plumes of methane in the northern hemisphere of Mars indicates some ongoing process is releasing the gas,’ said one agency scientist. The gas was detected with observations made over over several Martian years with NASA telescopes at Mauna Kea, Hawaii. Both biological and geological processes could explain the methane.”

Tapping the Earth For Home Heating and Cooling

suraj.sun recommends a CNet post giving details of a still little-known energy technology: the ground source heat pump or geo-exchange system. This is distinct from so-called geothermal energy, which taps the heat in the earth to provide energy. Geo-exchange is suitable in scale for small industry — the article describes one commercial re-development of an old mill into apartment and commercial space that put in a geo-exchange at about half the cost of traditional fossil fuel-based alternatives. Even some individual homeowners are opting for this green method of heating and cooling, at a premium in price of about 50 percent (but costs are very much per-project, largely because drilling is involved). “Rather than use underground heat, geothermal heat pumps attached to buildings capitalize on the steady temperature of the ground or deep water wells. In effect, they treat the Earth like a giant energy savings bank, depositing or withdrawing heat depending on the time of year. “