the Corrib gas project and Liquified Gas tanker imports at Shannon, concluding that the suggestion of 40% grid penetration by wind, is "unrealistic". In 2020, grid penetration had hit 36.3% and was still increasing but far slowly. By contrast, the Sustainable Energy Authority of Ireland said in 2014 that wind power cost the same as gas power. In 2020 the Irish Times reported that the cost of onshore wind energy had dropped over the last 20 years but that regulation on noise and height of turbines made Irish wind energy more expensive than elsewhere. Peatlands and bog landslides Building wind turbines and access roads on top of peatland results in the drainage and then eventual oxidation of some of the peat. The turbines represent a minor impact, provided that the entire wind farm area is not drained, potentially emitting more carbon dioxide (CO2) than the turbines would save. Biochemist Mike Hall said in 2009; "wind farms (built on peat bogs) may eventually emit more carbon than an equivalent coal-fired power station" if drained. A 2014 report for the Northern Ireland Environment Agency, which has similar peatland, notes that building wind turbines on peatland could release considerable carbon dioxide from the peat, weaken flood control, and spoil water quality: "The potential knock-on effects of using the peatland resource for wind turbines are considerable and it is arguable that the impacts on this facet of biodiversity will have the most noticeable and greatest financial implications for Northern Ireland." The Irish Peatland Conservation Council maintains a database on incidences where building wind turbines (and wind farms) on or near peatland caused devastating landslides, called "bog bursts"/"peat flows". These accelerate the release of carbon dioxide into the atmosphere. In October 2003, the building of a wind farm in County Galway caused the Derrybrien landslide, an almost 2.5 km long, 450,000 m3 bog landslide, polluting a nearby lake and killing 50,000 fish. The lake was also the source of the town of Gort's drinking water. If all carbon in the slide is being released, it represents 7–15 months of production from the wind farm in avoided carbon dioxide from fossil power. In 2004, engineering companies were convicted of being responsible for the pollution, while the wind farm company was acquitted. The Irish government was convicted in 2008 of poor oversight. Following the Corrie Mountain bog burst of 2008, Ireland was fined by a European Court