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20 tháng 5 2019

Advantages of Solar Energy

1. Renewable Energy Source

Among all the benefits of solar panels, the most important thing is that solar energy is a truly renewable energy source. It can be harnessed in all areas of the world and is available every day. We cannot run out of solar energy, un some of the other sources of energy. Solar energy will be accessible as long as we have the sun, therefore sunlight will be available to us for at least 5 billion years when according to scientists the sun is going to die.

2. Reduces Electricity Bills

Since you will be meeting some of your energy needs with the electricity your solar system has generated, your energy bills will drop. How much you save on your bill will be dependent on the size of the solar system and your electricity or heat usage. Moreover, not only will you be saving on the electricity bill, there is also a possibility to receive payments for the surplus energy that you export back to the grid. if you generate more electricity than you use (considering that your solar panel system is connected to the grid). 

3. Diverse Applications

Solar energy can be used for diverse purposes. You can generate electricity (photovoltaics) or heat (solar thermal). Solar energy can be used to produce electricity in areas without access to the energy grid, to distill water in regions with limited clean water supplies and to power satellites in space. Solar energy can also be integrated into the materials used for buildings. Not long ago Sharp introduced transparent solar energy windows.

Solar Energy Benefits

4. Low Maintenance Costs

Solar energy systems generally don’t require a lot of maintenance. You only need to keep them relatively clean, so cleaning them a couple of times per year will do the job. If in doubt, you can always rely on specialised cleaning companies, which offer this service from around £25-£35. Most reliable solar panel manufacturers offer 20-25 years warranty. Also, as there are no moving parts, there is no wear and tear. The inverter is usually the only part that needs to changed after 5-10 years because it is continuously working to convert solar energy into electricity and heat (solar PV vs. solar thermal). Apart from the inverter, the cables also need maintenance to ensure your solar power system runs at maximum efficiency. So, after covering the initial cost of the solar system, you can expect very little spending on maintenance and repair work.

5. Technology Development

Technology in the solar power industry is constantly advancing and improvements will intensify in the future. Innovations in quantum physics and nanotechnology can potentially increase the effectiveness of solar panels and double, or even triple, the electrical input of the solar power systems.

Disadvantages of Solar Energy

1. Cost

The initial cost of purchasing a solar system is fairly high. This includes paying for solar panels, inverter, batteries, wiring, and for the installation. Nevertheless, solar technologies are constantly developing, so it is safe to assume that prices will go down in the future.

2. Weather Dependent

Although solar energy can still be collected during cloudy and rainy days, the efficiency of the solar system drops. Solar panels are dependent on sunlight to effectively gather solar energy. Therefore, a few cloudy, rainy days can have a noeable effect on the energy system. You should also take into account that solar energy cannot be collected during the night. On the other hand, if you also require your water heating solution to work at night or during wintertime, thermodynamic panels are an alternative to consider.

3. Solar Energy Storage Is Expensive

Solar energy has to be used right away, or it can be stored in large batteries. These batteries, used in off-the-grid solar systems, can be charged during the day so that the energy is used at night. This is a good solution for using solar energy all day long but it is also quite expensive. In most cases, it is smarter to just use solar energy during the day and take energy from the grid during the night (you can only do this if your system is connected to the grid). Luckily your energy demand is usually higher during the day so you can meet most of it with solar energy.

4. Uses a Lot of Space

The more electricity you want to produce, the more solar panels you will need, as you want to collect as much sunlight as possible. Solar PV panels require a lot of space and some roofs are not big enough to fit the number of solar panels that you would to have. An alternative is to install some of the panels in your yard but they need to have access to sunlight. If you don’t have the space for all the panels that you wanted, you can opt for installing fewer to still satisfy some of your energy needs.

5. Associated with Pollution

Although pollution related to solar energy systems is far less compared to other sources of energy, solar energy can be associated with pollution. Transportation and installation of solar systems have been associated with the emission of greenhouse gases. There are also some toxic materials and hazardous products used during the manufacturing process of solar photovoltaic systems, which can indirectly affect the environment. Nevertheless, solar energy pollutes far less than other alternative energy sources.

30 tháng 8 2023

Tham khảo:

             THE ADVANTAGES AND DISADVANTAGES OF SMART CITIES

     Smart cities are built on new technologies to improve people's lives. The idea of living in one of them sounds very exciting. But is a life controlled by smart technologies good or bad for us?

     Let’s start with the advantages. One of the biggest advantages of smart cities is the high level of convenience they offer. With smart technologies in place, people can access information and services quickly and easily. This makes daily life more efficient and saves people a lot of time. Additionally, smart cities are designed to be more sustainable, with green spaces and public transport options to reduce pollution.

     What about the disadvantages? One of the main concerns people have about smart cities is the potential loss of privacy. With sensors and cameras constantly monitoring people's movements, there is a risk that sensitive information could be collected and shared. This can lead to a lack of trust and a feeling of being constantly watched. Furthermore, there are concerns about the potential for technology failures and the risks posed by hackers.

     In conclusion, there are both advantages and disadvantages of living in a smart city. In my opinion, the benefits of smart technologies outweigh the drawbacks. However, it is important that measures are put in place to protect people's privacy and ensure the safety of their personal information. As long as these concerns are addressed, smart cities have the potential to revolutionize the way we live and work.

24 tháng 5 2021

Bài mk tham khảo từ một số trang web nhé

       AI (Artificial Intelligence), is artificial intelligence, is intelligence demonstrated by machines, as opposed to natural human intelligence, which is commonly used to describe machines. AI is a great achievement of modern science, if you know how to apply it, it will bring a lot of benefits to you such as it can detect and limit risks, help people predict risks. of all mankind such as epidemics, natural disasters,... Next, AI was born to help people save more and more labor because of its high automation ability. Thanks to AI, humans can reduce labor in operating the line. There is also a language bridge, unleashing creativity,... It also helps us to create texts from words. self-synthesizing computer data, converting human speech into a form that can be understood by computer applications, providing data as well as computing technologies. The positive change that AI can bring, but there is also considerable anxiety surrounding the technology. As AI continues to become more advanced, the repetitive jobs of bankers are likely to be completely replaced by artificial intelligence. Therefore, it is very important to increase the benefits that outweigh the risks of artificial intelligence to life.

24 tháng 5 2021

Tham khảo

Nowadays, many thousands of A.I. applications are so popular that they are not even thought of as being A.I. anymore. However, it has been noted that there are both advantages and disadvantages to relying on these intelligent machines.
Automated machinery is efficient in manufacturing and makes retail easier. Many large factories use fully automated systems that receive raw materials at the start of a production line and output a packaged product at the end. Machines can also load trucks with the packaged products for delivery to customers. In addition to its applications in manufacturing, automated machinery can also be used to save lives and help people to heal. For example, in the hospital, an automated breathing machine can help a patient to breathe, an automated dialysis machine can clean a kidney patient’s blood, and an automated X-ray machine can provide reliable X-ray images for the doctor to use in discovering the exact cause of an illness.
However advantageous, one of the great disadvantages of automated machinery is the potential loss of information or even human lives. The production line in a factory, or the treatment process of a patient, can be interrupted if a power failure happens. Moreover, automated machines or robots could fail to work properly if they were damaged or hacked by wrongdoers. If a military drone was hacked or malfunctioned, innocent people could be hurt or killed.
Taking everything into consideration, the advantages of using automated machines outweigh their disadvantages. With the advances in technologies occurring now and in the future, there is the very real potential for a better world and human life extension.

26 tháng 11 2023

Living in a smart city brings many benefits and disadvantages. In this article, I will present some pros and cons of living in a smart city.

The first advantage of living in a smart city is convenience. Information and communications technology is integrated into urban systems, helping to provide public services more effectively. For example, through mobile applications, people can easily search for information about transportation, destinations, and entertainment activities. Furthermore, the smart traffic system helps reduce congestion and save travel time.

Another advantage of smart cities is energy saving and environmental protection. Advanced technologies are applied to manage and use resources effectively. For example, automatic lighting and temperature regulation in buildings help save energy. In addition, the use of smart public transport and self-driving cars helps reduce polluting emissions.

However, living in a smart city also has disadvantages. One of them is the issue of information security. With the widespread use of information technology, the risk of personal information insecurity and privacy violations increases. This requires strong security measures to ensure the safety of people's personal data.

Another drawback of smart cities is their dependence on technology. If technology systems fail or are attacked, public services could be disrupted. This poses challenges for maintaining stability and ensuring security of smart cities.

In short, living in a smart city brings many benefits such as convenience and energy savings. However, it is also necessary to pay attention to information security issues and dependence on technology. To make the most of the advantages and minimize the disadvantages, smart investment and management from city managers is needed.

12 tháng 11 2023

Living in a sustainable city has numerous advantages, including access to clean and renewable energy sources, efficient public transportation systems, and a strong sense of community. Sustainable cities also tend to have better air and water quality, as well as more green spaces for residents to enjoy. Additionally, sustainable cities often prioritize local and organic food production, leading to healthier and more environmentally friendly food options. However, there are also some disadvantages to living in a sustainable city, such as higher cost of living, potential limitations due to regulations and restrictions, and ongoing challenges related to waste management and pollution.

26 tháng 11 2023

Living in a smart city brings many benefits and disadvantages. In this article, I will present some pros and cons of living in a smart city.

The first advantage of living in a smart city is convenience. Information and communications technology is integrated into urban systems, helping to provide public services more effectively. For example, through mobile applications, people can easily search for information about transportation, destinations, and entertainment activities. Furthermore, the smart traffic system helps reduce congestion and save travel time.

Another advantage of smart cities is energy saving and environmental protection. Advanced technologies are applied to manage and use resources effectively. For example, automatic lighting and temperature regulation in buildings help save energy. In addition, the use of smart public transport and self-driving cars helps reduce polluting emissions.

However, living in a smart city also has disadvantages. One of them is the issue of information security. With the widespread use of information technology, the risk of personal information insecurity and privacy violations increases. This requires strong security measures to ensure the safety of people's personal data.

Another drawback of smart cities is their dependence on technology. If technology systems fail or are attacked, public services could be disrupted. This poses challenges for maintaining stability and ensuring security of smart cities.

In short, living in a smart city brings many benefits such as convenience and energy savings. However, it is also necessary to pay attention to information security issues and dependence on technology. To make the most of the advantages and minimize the disadvantages, smart investment and management from city managers is needed.

25 tháng 4 2021

Wind energy has the advantage of protecting the environment, avoiding the release of toxic gas, which is also the energy for the movement of hot air balloons, sailing boats and many other vehicles. In addition, wind energy is also used to generate electricity, but that is also a big disadvantage because the wind blows infrequently and the uneven speed causes low productivity. But anyway, it is also a method, an energy source to protect the environment. mong là bạn dùng được vì mình viết hơi sơ sài :)))

25 tháng 4 2021

     In the world there are many types of energy sources, wind energy is one of them. It is a renewable energy source, so it has many advantages. Firstly, it is not harmful to the environment, people will not need to worry about environmental problems when using it. Second, wind energy lasts forever, and like tidal or solar energy, we will never run out of it. Third, it is cost effective. There are no costs associated with buying or transporting fuel into wind turbines, like coal-fired power plants. In addition, with advancements in technology, wind energy will become cheaper, thereby reducing the amount of capital that countries have to spend to meet their energy needs. However, it also has disadvantages. Windmills will make noise for everyone nearby, causing noise pollution. Not only that, the animals around it can also be in danger. Are birds safe to crash into windmill wings? Despite the downsides, the advantages of wind power are also great. It would be great if we humans use it in the future.

18 tháng 4 2019

The main source of energy at present is fossil fuel.

Some alternative sources of energy are wave energy, solar energy, biofuels, natural gas, geothermal power, wind energy, biomass energy, tidal energy, hydrogen gas, etc.

Their advantages are that they are renewable and is most likely to never run out. Also, they are easier to find than fossil fuels. They produce little or no waste that is harmful to the environment like carbon dioxide or methane so they are more environmentally friendly. Their disadvantages are that they don't produce as much energy/electricity as fossil fuels. Another disadvantage is that they rely on their surrounding. For example, wind energy needs to be generated at a windy location and needs wind turbines that take up a lot of space or solar energy needs to be generated at a sunny area and needs lots of solar panels.

19 tháng 4 2019

bạn tự viết đó hả?

30 tháng 8 2023

1. B

2. A

3. A