Excess nitrogen promotes algae growth, robbing the water of oxygen. In North America and Europe, lakes and rivers contain 20 times the nitrogen they did before the Industrial Revolution. Arsenic has been a common additive in factory chicken feed for nearly 50 years.
It is used to kill parasites, reduce stress, and promote growth in the birds. The practice has long been deemed safe. Recently, however, scientists have found that the substance turns carcinogenic rather quickly after application. Arsenic-imbued manure becomes toxic to the environment when spread as fertilizer.
The risk for those who ingest the meat of treated birds is, in fact, worse than once thought, particularly since exposure to arsenic is cumulative and people are eating three times the chicken they once did in the s.
Blog at WordPress. Ben Eastaugh and Chris Sternal-Johnson. Subscribe to feed. Tag Archive. Let the sun shine in. Rate this:. Like this: Like Loading All About Me I start many things with good intentions, many, many things. This time I intend to stay focused. This time I will not leave behind what I started. The modern age of solar power arrived in when researchers at Bell Laboratories developed a photovoltaic cell capable of effectively converting light into electricity.
The utilization of solar energy and solar power spans from traditional technologies that provide food, heat and light to electricity which is uniquely modern. The diversity of form and long history of solar energy are manifest in a wide variety of applications.
Active solar systems use electrical and mechanical components such as tracking mechanisms, pumps and fans to process sunlight into usable outputs such as heating, lighting or electricity. Passive solar systems use non-mechanical techniques of controlling, converting and distributing sunlight into usable outputs such as heating, lighting, cooling or ventilation. These techniques include selecting materials with favorable thermal properties, designing spaces that naturally circulate air, and referencing the position of a building to the sun.
Direct solar generally refers to technologies or effects that involve a single conversion of sunlight which results in a usable form of energy. Indirect solar generally refers to technologies or effects that involves multiple transformations of sunlight which result in a usable form of energy.
A solar cell or photovoltaic cell is a device that converts light into electricity using the photovoltaic effect. Another use has been in remote applications such as roadside emergency telephones, remote sensing, cathodic protection of pipe lines, and limited "off grid" home power applications.
To take advantage of the incoming electromagnetic radiation from the sun, solar panels can be attached to each house or building. The easiest way to use this electricity is by connecting the solar panels to a grid tie inverter.
Reference Terms. Solar energy also broadly describes technologies that utilize sunlight. The applications are diverse and date back millennia. In , the French engineer Auguste Mouchout successfully powered a steam engine with sunlight. This is the first known example of a solar powered mechanical device. Unfortunately, Auguste Mouchout's research only stops here. France soon signed a number of agreements with the UK in providing long-term cheap coal energy.
Auguste's invention in finding alternative sources of energy was no longer a priority of the French government. Without receiving the necessary funding for research, Auguste Mouchout soon had to give up his dream of an endless new energy.
Willoughby Smith, an English scientist who happened to discover a solar battery material. While testing some of the materials for his transatlantic telecom cable design, he accidentally found a new material with high light sensitivity.
Some of the first experiments were performed and recorded regarding this new material sample. William Adams released the first official book about solar energy: ' Alternative energy source for fossil energy in tropical countries '. With the help of the young student Richard Day, he had an interesting design using mirrors to create solar energy equivalent to a 2. His design is considered a huge step forward Mouchout's previous design is only equivalent to a 0.
Charles Fritz was the first scientist to succeed in converting solar energy into electrical energy. John Ericsson, an immigrant American, wrote the following comments: ' After more than 2, years of living and surviving on earth, humanity will soon use all of its fossil energy resources.
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