Vertical Axis Wind Turbines
Wind Turbines Noise
Today large wind turbines has less noise (around 45 decibels-dB) than the background noise that we hear in our own homes (5odB)! According to the American Wind Energy Association (AWEA), today an operating wind farm at a distance of about 750 to 1,000 feet is no noisier than a kitchen refrigerator or a moderately quiet room. The careful placement of these turbines can justify this.
Death of birds caused by Vertical Axis Wind Turbines
Although birds rarely collide with the turbines, wind power is less threatening to birds than many other common structures. In fact, the National Audubon Society said it supports the use and development of wind energy.
Based on numerous studies that have taken place in New York, Oregon, Vermont, Colorado, Wyoming, Minnesota and California, the collision of birds with wind turbines result in less than 2.1 bird deaths per year. In comparison, every year about 60 million birds died in collisions with vehicles, at least 98 million by colliding with buildings and windows and at least 4 million in collision with communications towers.
It should be very mindful of the location of the vertical axis wind turbines, to ensure that they will not be installed along the routes of migrating birds or the tracks of rare or endangered birds. In another study, it was estimated that all the American domestic cat kills between 100 and 200 million birds, compared with about 33,000 birds killed by collisions with wind turbines worldwide.
Alternatives to Vertical Axis Wind Turbines
Think about it, the death of birds from the production of electricity based on fossil energy:
- High Chimneys - A study done at a single site that runs the coal in Florida, with four fireplaces, recorded nearly 3,000 birds killed during a single night during autumn migration.
- Pour oil into the sea - in a single accident with a ship - the Exxon Valdez spill in Prince William Sound in Alaska - killed more than 500,000 migratory birds, about 1,000 times the estimated wind turbines in California for a year.
- The additional threats to birds from other energy sources include: mercury emissions by coal-powered facilities, global climate change from burning fossil fuels, acid rain resulting from the emission of SO2 and NOx emissions by coal-fired plants; habitat destruction resulting from mining activities associated with the coal, gas, oil and uranium.
- Property values: The view of wind turbines will have no negative impact on the value of a property. A recent study on the impact of wind power stations, said that "based on the level of inspection throughout the country carried out by assistants of taxes in other areas with projects for the installation of wind power station, we did not find anything that supported the claim that the views wind farms decrease the value of property". Other studies, both made in America and abroad, came to similar conclusions.