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Are you looking for a career path that you have complete control over every part of the business? No more boss to worry about. Starting a greenhouse business may be something to consider.

How does the sound of taking control of your electricity bills and saving as much as 20% on your monthly energy consumption appeal to you? With the use of the Black and Decker energy usage monitor, these are possible.

Will Stewart has a guest post up at The Oil Drum on passive solar design techniques - Passive Solar Design Overview - Part 1. Also, at TOD, a post on the Passivhaus standard from another long-time commenter, marjorian - US Housing and the Passive Home Standard. Passive solar refers to the design and placement of a building to enable solar heating without the need for sensors, actuators, and pumps, in contrast to active solar, which utilizes pumps/blowers, sensors, and logic control units to manage collection, storage, and distribution of heat. The two techniques are not exclusive, however, and can work together effectively. As solar radiation (insolation) is a diffuse energy source, and not at the beck and call of a thermostat, passive solar design techniques are at their best when combined with other related methods, such as energy efficiency (insulation, weatherization, building envelope minimization), daylighting, passive cooling, microclimate landscaping, and a conservation lifestyle (i.e., temperature settings, raising and lowering of insulated shades, etc). Most of these topics will be covered in other articles, though passive cooling will be addressed in this series, which is intended as an overview, as a complete engineering treatment on passive solar design would require several dozens of articles.

How important is it to eat organic? Is it a fad, a craze or is it a warning against chemical fertilizers and GMO crops, which will help protect the next generation? Organic farming is natural farming, that means no chemical fertilisers, no genetic modification for either food crops or feed crops. Commercial farming pushing demand for agricultural produce forced a shift towards chemical fertilisers and farming methods to maximise output, for maximum profit, unaware of the significantly unnatural processes being used can be harmful. At the consumer level organic produce is a relatively new phenomena. On the supermarket shelves we are finding products labelled 'organic', most of us think it means 'natural' or 'cruelty free'. When you buy organic you are buying a green product . That means methods such as green fertilisers, crop rotation and biological pest controls are used instead of toxic chemical fertilisers and genetically modified organisms which are harmful to the land. Organic farming composes about 2% of all farming on the planet.

REW reports the world's biggest solar thermal tower has opened in Spain - World's Largest Solar Power Tower Commissioned. Abengoa Solar has begun commercial operations of the world's largest solar power tower plant, a 20 MW installation. The company claims that the performance of the power plant, the so-called PS20, has exceeded its design output in the wake of its three-day production and operational testing period. Located at the Solúcar Platform, near Seville, Spain, PS20 is the world's second power tower plant in commercial use and features a number of significant technological improvements with respect to its predecessor, PS10. These enhancements include a higher-efficiency receiver, various improvements in the control and operational systems, and a better thermal energy storage system. PS20 consists of a solar field made up of 1255 heliostats with a surface area of 1291 square feet each. This reflects the solar radiation it receives onto the receiver, located on the top of a 531 foot-high tower, producing steam which is converted into electricity generation by a turbine. Plant construction was carried out by Abener.

The system has been designed in such a way that it can support up to two OutBack FX series inverter or chargers or up to two MX60 charge controllers and all necessary AC and DC components.

Delta-T Pro wireless Wi-Fi access is mainly used to control solar thermal collector systems which include open loop and closed loop with a heat exchanger. It is also used in residential domestic water heating with electrical ignition and combination systems with space heating.