Recycling helps in preventing global climate change to a great extent. By minimizing the energy spent on industrial production, recycling also helps in reducing greenhouse gas emission. Some of the major fossil fuels used in most industries include coal, diesel, gasoline etc. All these emit harmful gases such as methane, sulfur dioxide, carbon-dioxide to the environment. The processing of fresh raw material also creates toxic materials which pollute the environment. By reducing the energy used, recycling also minimizes the amount of fuel usage which in turn reduces the amount of harmful pollutants in the environment.
Sunday, April 12, 2009
Recycling Saves Energy
When new products are manufactured from the raw material obtained from recycled products, it saves a lot of energy which is consumed for the production. When new products are manufactured from ‘virgin materials’, the amount of energy consumed is much higher. Besides, the energy required to acquire and transport the ‘virgin’ raw materials from their origins or natural sources is also saved. Add to that the energy which is required to clean and protect the environment from the pollutant waste products, especially those which are non-biodegradable (plastic) and fill up the landfill areas.
Process of Recycling
The recycling process involves three stages. In the first stage the old products are collected and processed, where they are sorted, cleaned and made ready for recycling or manufacturing new products. The second stage involves the manufacturing of new products from the raw material obtained by the processing of the old products. Finally, the process ends with the purchasing of recycled goods by the consumers. The more people step forward to buy recycled products the better the success of the recycling process can be ensured. Buying recycled products will only increase when every individual will develop an awareness of the difference that can be made by utilizing their old household objects as raw materials to produce new goods and help the environment by recycling.
Why is Recycling Important
The importance of recycling can be observed in multiple ways. If you are wondering in your mind as to "why I should recycle" then here are some causes which should convince you to do so.
Importance of Recycling
Before you know about the importance and benefits of recycling and its relation to a better environmental condition, it is essential to understand what is recycling. Recycling refers to the process of collecting used materials which is usually considered as ‘waste’ and reprocessing them. In this process these used materials are sorted and processed to be used as ‘raw materials’ for the production of new products. Recycling varies from ‘re-use’ in the sense that while re-use just means using old products repeatedly, recycling means using the core elements of an old product as raw material to manufacture new goods. Some of the most common items that are recycled are plastic, glass, paper, batteries, aluminum etc.
What is Satellite TV
Satellite TV is the television system wherein communication satellites orbiting the Earth bring about the transmission of television signals. It is a wireless system that facilitates the relay of TV programs by means of satellite communication. In many countries around the world, satellite television services are used for providing the consumers with more number of TV channels and a wider range of services. Do you know when the first satellite TV signal was relayed? It was way back in 1962 that the first satellite television signal went from Europe to the Telstar satellite over North America. Anik 1, a domestic geostationary satellite of Canada was the first of its kind to carry television signals. From then, there was no looking back and the popularity of satellite television continues to rise.
How does Satellite TV work?
The satellites that aid the transmission of television signals have elliptical or geostationary orbits. The satellite television setup consists of a transmitting antenna or uplink satellite dishes pointed towards specific satellites. The dishes have large diameters, which help in increasing the signal strength and enable accurate aiming at the satellite.
The satellite houses transponders, which receive signals from the antenna. The uplinked signals are tuned to a frequency range that corresponds to that of the transponders. The transponders retransmit the signals back to Earth. Before they are retransmitted, the signals undergo a process of translation wherein they are transmitted at a different frequency band in order to avoid interference with the uplink signal.
The signals that are transmitted by the transponders on a satellite are received by the parabolic dish. On account of traveling a substantially large distance, the signal received by the dish is weak. The signal is reflected towards the feedhorn, a device mounted at the focal point of the dish. The function of a feedhorn is to collect the received signal and conduct it towards the low-noise block downconverter (LNB).
The LNB amplifies the signal and converts it to a frequency that is suitable for transmission over a cable, precisely to the L-band range. The LNB transmits the signal over the intra-facility link (IFL) to the satellite receiver. IFL refers to the coaxial cable that connects the indoor and outdoor satellite equipments. Owing to the LNB, the handling of L-band signals becomes easy. Also, low-cost cables can be used to connect the television receiver with the TV dish and the LNB. The satellite receiver sends the signals to the television set and it is ready to come alive!
While you are lazily flicking through television channels, the satellite communication system is busy delivering content. So the next time you switch on your TV, I am sure, you will take a moment to think of all that goes behind the relay of radio signals to your television set.
The satellite houses transponders, which receive signals from the antenna. The uplinked signals are tuned to a frequency range that corresponds to that of the transponders. The transponders retransmit the signals back to Earth. Before they are retransmitted, the signals undergo a process of translation wherein they are transmitted at a different frequency band in order to avoid interference with the uplink signal.
The signals that are transmitted by the transponders on a satellite are received by the parabolic dish. On account of traveling a substantially large distance, the signal received by the dish is weak. The signal is reflected towards the feedhorn, a device mounted at the focal point of the dish. The function of a feedhorn is to collect the received signal and conduct it towards the low-noise block downconverter (LNB).
The LNB amplifies the signal and converts it to a frequency that is suitable for transmission over a cable, precisely to the L-band range. The LNB transmits the signal over the intra-facility link (IFL) to the satellite receiver. IFL refers to the coaxial cable that connects the indoor and outdoor satellite equipments. Owing to the LNB, the handling of L-band signals becomes easy. Also, low-cost cables can be used to connect the television receiver with the TV dish and the LNB. The satellite receiver sends the signals to the television set and it is ready to come alive!
While you are lazily flicking through television channels, the satellite communication system is busy delivering content. So the next time you switch on your TV, I am sure, you will take a moment to think of all that goes behind the relay of radio signals to your television set.
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