Throughout the world, farmers are turning to greenhouses to protect and improve their crops. Greenhouses are used by growers to extend the growing season and to protect plants from the elements. However, growers must closely regulate the climate of their greenhouses to support the plants that are inside. Understanding how a greenhouse functions is vital to choosing proper heat regulating techniques in a greenhouse. In order to understand how to regulate a greenhouse one must understand how a greenhouse functions. Transparent coverings on a greenhouse, such as plastics or glass, allows energy from the sun, in the form of light, to enter a greenhouse and heat the materials inside, and the covering also prevents the heat from escaping back …show more content…
For example, evaporative cooling can be used to cool greenhouses in regions of the world with high temperatures and low humidity. Evaporative cooling utilizes the heat of the greenhouse air to evaporate water from plants and other wet surfaces, cooling the greenhouse between 10 and 20 degrees below the outside temperature (Bartok, “Ventilation for Greenhouses”) As water evaporates from surfaces in the greenhouse it draws heat along with it and allows the air to be cooled. This method of cooling is energy efficient and thus is much more economical than other cooling options. In addition, insulation is used in greenhouses located in climates with lower average temperatures. Insulation is used as a barrier between the colder outside air and the warmer internal air. During winter months, there is not always enough light to warm a greenhouse to an acceptable temperature, so greenhouse operators use heaters to warm their greenhouse. However, many greenhouses have to be insulated by energy screens that “can provide 30 to 50% savings in heating costs” (Bartok, "Energy and Shade Screen”) Often referred to as energy blankets, they save energy by reducing the amount of the greenhouse that is exposed to the outside air and trapping the warm air on the inside of the screen. Whether a greenhouse needs to be cooled or heated, different technologies and techniques can be used to maintain a constant
Snyder, R. (2009). Water In The Greenhouse. Growing Produce. Retrieved on March 20, 2014 from http://www.growingproduce.com/uncategorized/water-in-the-greenhouse/
The House on Mango Street shows the emotions of a little girl who moves into a real house for the first time. It is narrated by the little girl who explains why she is unhappy with her family's choice. While she feels as if she should be happy she knows that this is not what her family and herself want. The narrator feels that the house is not what she wants and that the house is not what they deserve.
To provide a safe environment for wandering residents, the health care providers face many challenges. It is a general premise that Information technology (IT) can address these challenges in enhancing health care services for wandering residents. The providing case study “Hacienda Home for the Aged” illustrates the issues of Hacienda Home regarding to the health of wandering residents. Hacienda Home is composed of a very active “Residence Council” and a very active and involved “Family Council”, and Maria Sanchez is its chief executive officer. She is aware to address the solutions of technological issues at Hacienda Home because the home is based on an important principle, “commitment to ensuring the home like atmosphere and to contacting
Think about a time when your car was parked on the side of the street all day long. Then you decide to run to the store and get some things for dinner. The minute you opened the car door, you feel the currents of hot air blowing past you, and when you sit down, you feel as if your car is radiating heat! This is a tiny, yet real example of the process called the greenhouse effect. This effect includes a form of matter, absorbing heat or radiation from the sun. What happened in the car was the glass assists the absorption of the heat and trapped the heat inside, containing it. Equally, the earth's atmosphere contains gases called greenhouse gases such as Carbon Dioxide, Methane, and water vapor, which absorbs the rays we receive from the sun, and trap the heat inside. Our atmosphere, which contains the greenhouse gases acts like a blanket; absorbing the heat from the sun, and preventing it from going away from the earth's surface. The more the heat gets trapped because of the increase in greenhouse gases, the more the temperature rises, causing global warming. Global warming is “an increase in the earth's atmospheric and oceanic temperatures widely predicted to occur due to an increase in the greenhouse effect resulting especially from pollution,” (Merriam Webster Dictionary). The two main causes of global warming are the greenhouse effect and solar variations. The Greenhouse Effect “refers to the process by which absorption and emission of infrared radiation atmosphere gases (mainly Greenhouse gases such as CO, NO, and Carbon Monoxide) warms the Earth’s atmosphere and surface,” (Merriam Webster Dictionary).Solar Variations are “changes in the amount of radiant energy emitted by the Sun,” (Wikipedia).
Marching for days without water, soldiers lost morale and the energy to reach their destination. To solve this situation, their general told them that a forest of plum trees was steps away. His words not only caused his soldiers to salivate and quench the thirst to some degree, but also motivated some to keep marching to a place that had water. The plums and the water abundant region associated with them were the soldiers’ hope—a belief that something good would happen in the near future. This hope facilitated the materialization of positive things by incentivizing the soldiers to proceed. However, this folktale also entails a negative influence of hope. The hope made the soldiers less thirsty at first, and some soldiers thought this mechanism would continue to work; they took no actions to turn the hope into the reality and were doomed to death.
in the same way that a greenhouse does, by trapping heat energy inside the atmosphere. Unfortunately, since the
..., and industrial revolution have increased greenhouse gasses in the atmosphere. Greenhouse gases are beneficial for the environment, without them humans wouldn't be able to live on earth. The job of greenhouse gases is to allow sunlight to come into the atmosphere, and then absorb infrared radiation to warm up the earth. The four main greenhouse gases are carbon dioxide, methane, water vapor, ozone, and methane. Among all the greenhouse gasses CO2 plays the an important role because it accounts for 80% of total greenhouse gas emission ( Gore, 2006). In Dr. Cowley’s study he noticed that when past radiance of the sun and volcanic activities were put into a computer model to simulate the energy flow from earth and to earth. The computer produced temperature matching those of the climate from a 1000 years ago. But temperature changed completely in the 20th century.
First is a description of the greenhouse effect. The earth’s atmosphere has four layers, or zones, with each having distinct differences in temperature. The troposphere is the first layer surrounding the earth. Within this layer air is continually circulating and moving heat and moisture around the earth. The troposphere is denser than the other layers due to the fact that gravity keeps the majority of air molecules near the earth. This is about 75 percent of all the atmospheric mass. It is also the warmest layer (Cunningham & Cunningham, ...
To understand the issue, global warming must be defined as well as broken down. Earth has a fairly simple way of regulating global temperature, involving natural gases. After reading the article, “What is the Greenhouse Effect?” the author explains in other words;
Due to large and excessive amount of these gases being discharged into the atmosphere by human innovations, the greenhouse effect is extending and this is causing the rise in earth's temperature that we have been encountering in the last two centuries. Since 1750, the use of carbon dioxide alone has risen about 36%, and since 1880, the earth's temperature has raised 1 degrees Fahrenheit. Although this may not be a huge increase, but the consequences it leaves on our environment and the organisms that live in are harmful and life-threatening. Adoption of this kind of quick change in temperature is challenging to plants and
The world’s climate is kept stable and suitable to live in, mainly by rainforests, in a number of ways. They are often known as ‘climate controllers’. They keep the planet cool, as they absorb much of the suns heat, instead of reflecting it back into the atmosphere.
The commonly debated “greenhouse effect” refers to “the global-average temperature increase that has been observed over the last one hundred years or more” (Spencer). President Barack Obama addressed the issue as an effort to highlight its severity, "We have to all shoulder the responsibility for keeping the planet habitable, or we’re going to suffer the consequences – together” (Leader). The earth’s increasing atmospheric and oceanic temperatures result in climate changes due to cumulative amounts of carbon dioxide (CO2) in the atmosphere.
Our society is riddled with countless problems that are causing discussions and debates around the world. One of the most important problems is crucial to focus on and it is climate change or “the greenhouse effect.” The greenhouse effect is a serious problem that is destroying the planet and its atmosphere. Rules and regulations need to be made if want future generations the have a place to call home.
Home gardens offer a wide variety of benefits to the environment and serve a diverse group of people. Home gardening provides a source of fresh produce and free of chemicals, it also gives you complete control over the chemicals and products used during the growing process. A home garden allows you to pick the produce when its ripe, unlike produce at the store is often picked before its fully ripe. The quality and flavor of the freshly picked produce from home is better than the produce that might have unknown chemicals and was likely picked several days or weeks before being sold. The produce retains more nutrients when consumed shortly after being picked, making your home garden vegetables a healthier option. A garden also provides a positive environmental impact. The compost allows you to recycle certain kitchen and yard waste into a nutrient-rich additive for the garden. This provides natural fertilizer for you plants and reduces the wastes you produce. If you choose to avoid or limit chemical use, you reduce pollution from your gardening activities. Besides being good for the environment gardens have environmental gains for us. Gardening help control urban temperatures, If the environmental landscape design is effective it can cool your home in summer and warm it in winter, it can also reduce the energy cost by up to 20%. Gardening, and all the physical activity that goes along with it, leads to a better overall physical health, weight loss, improve you bones, and reduces the risk of having osteoporosis. “In a study of 3,310 older women, researchers from the University of Arkansas found that women involved in yard work and other types of gardening exercises had lower rates of osteoporosis than joggers, swimmers, and women wh...
Would you enjoy having fresh, delicious, luscious vegetables to eat all summer long that cost you almost nothing? I know I would. Well, now you can have your veggies and eat them too. Try building your own vegetable garden. It can fit all sizes of yards and decks. You just need to pick the location and type of garden. Next, you will prepare the garden site and work the soil. Finally, you will plan the specifics and plant your garden. With some care and patience, you will be enjoying the fruits of your labor in no time.