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tự suy nghĩ cũng ra. mặt trời có ích lợi gì ( chiếu sáng, sưởi ấm,..) bất lợi (hạn hán, nắng nóng, dễ cháy nổ, cháy rừng,....)
1.
Solar Power Advantages
There are many solar power advantages worth noting. In no particular order (well, perhaps simply the order in which they come to mind), here are some of the top advantages:
Solar power helps to slow/stop global warming. Global warming threatens the survival of human society, as well as the survival of countless species. Luckily, decades (or even centuries) of research have led to efficient solar panel systems that create electricity without producing global warming pollution. Solar power is now very clearly one of the most important solutions to the global warming crisis.
Solar power saves society billions or trillions of dollars. Even long before society’s very existence is threatened by global warming, within the coming decades, global warming is projected to cost society trillions of dollars if left unabated. So, even ignoring the very long-term threat of societal suicide, fighting global warming with solar power will likely save society billions or even trillions of dollars.
Solar power saves you money. Putting solar PV panels on your roof is likely to save you tens of thousands of dollars. The average 20-year savings for Americans who went solar in 2011 were projected to be a little over $20,000. In the populous states of New York, California, and Florida, the projected savings were over $30,000. In the sunny but expensive paradise known as Hawaii, the projected savings were nearly $65,000!
Beyond solar PV panels, it’s worth noting that solar energy can actually save you moneyin about a dozen other ways as well — with proper planning and household design choices.
Solar power provides energy reliability. The rising and setting of the sun is extremely consistent. All across the world, we know exactly when it will rise and set every day of the year. While clouds may be a bit less predictable, we do also have fairly good seasonal and daily projections for the amount of sunlight that will be received in different locations. All in all, this makes solar power an extremely reliable source of energy.
Solar power provides energy security. On top of the above reliability benefit, no one can go and buy the sun or turn sunlight into a monopoly. Combined with the simplicity of solar panels, this also provides the notable solar power advantage of energy security, something the US military has pointed out for years, and a major reason why it is also putting a lot of its money into the development and installation of solar power systems.
Solar power provides energy independence. Similar to the energy security boost, solar power provides the great benefit of energy independence. Again, the “fuel” for solar panels cannot be bought or monopolized. It is free for all to use. Once you have solar panels on your roof, you have an essentially independent source of electricity that is all yours. This is important for individuals, but also for cities, counties, states, countries, and even companies. I was recently in Ukraine touring various cleantech initiatives and projects. While there, I discovered that Ukraine in recent years has saved approximately $3 billion in reduced oil and gas imports from Russia thanks to the solar power plants developed by a single developer. Impressive.
Solar power creates jobs. As a source of energy, solar power is a job-creating powerhouse. Money invested in solar power creates two to three times more jobs than money invested in coal or natural gas. Here’s a simple chart on that point:
So, there are 7 big solar power advantages that you should remember and share. There are actually several more, but I think we can leave it at that for today. Let’s move on to solar power disadvantages….
Solar Power Disadvantages
Solar power disadvantages are actually not so plentiful. In fact, there’s only one notable disadvantage to solar power that I can think of. That disadvantage is that the sun doesn’t shine 24 hours a day. When the sun goes down or is heavily shaded, solar PV panels stop producing electricity. If we need electricity at that time, we have to get it from some other source. In other words, we couldn’t be 100% powered by solar panels. At the very least, we need batteries to store electricity produced by solar panels for use sometime later.
However, there are a couple of key things to note regarding this solar power disadvantage. Firstly, the sun actually does shine when we need electricity most. As humans (not vampires), our days more or less follow the movement of the sun. Society more or less wakes up when the sun rises. At the time of the sun’s greatest height and visibility, humans tend to be most active. At this time, we are of course using much more electricity than in the middle of the night, so electricity is in greater demand. (This also makes electricity more expensive in the middle of the day, making electricity produced from solar panels more valuable.)
Another important point worth noting on this front is that, with storage, solar power could theoretically supply the world with all of its electricity needs. In fact, nothing on earth compares to the energy potential of sunshine:
Beach holiday
advantage - you can eat marshmalow with friends around fire camp
disadvantage - you have to be careful with wild animals
City break
advantage - you can hang out with your parents
disadvantage - you have to stay healthy
Climbing holiday
advantage - you can enjoy the scenery
disadvantage - you have to wear warm clothes
coach tour
advantage - you can feeling safe
disadvantage - you can't see the scenery for too long
safari
advantage - you can see new things
disadvantage - you can have accident
skiing
advantage - you can have fun on the ice
disadvantage - you can fall if you don't know how to ski
Làm việc theo cặp. Hãy suy nghĩ về các loại lễ dưới đây và viết một lợi thế và một bất lợi cho mỗi kỳ nghỉ
kỳ nghỉ bãi biển cắm trại nghỉ thành phố đột leo HLV kỳ nghỉ chuyến thám hiểm trượt tuyết
ví dụ: kỳ nghỉ bãi biển:
lợi thế - bạn có thể bơi trong biển
Nhược điểm - bạn phải cẩn thận trong ánh mặt trời.
Nowadays,many people spent much time watching television.It can't be denied that since television was invented,it has changed our life in many ways ,and brought us many advantages as well as disadvantages.
Television plays an important role in our daily life.It's very informative.Through television,we can get the latest information easily and rapidly without leaving home.We can learn more and more about the world we live and see many interesting things.Our knowledge is broadened in many ways.
Secondly,televiosin helps us to enrich our spiritual lives.In particular,we can learn the language we like such as English,Chinese,France,Spanish,Japanese.....through language programs.We can be good and clever at doing jobs,making cake,cooking,arranging flowers through practical course which is taught on television.
And watching is an enjoyable way to relax.After a hard-working day,it's so comfortable and fun to sit at the armchair and see a movie or watch a comedy program.There are also educational programs on television,so children can learn a lot from these programs.
On the other hand,televiosion has some disadvantages.It has negative effects,especially for children.Some movies contain violence or crime.Therfore,the evil influence of televison on the young generation is inevitable.It encourages them to commit crime,or make children grow up to be violent adults.
What's more,watching television too much makes us passive.When watching TV,our brains don't need to work.Therefore,our brains become lazier.Watching TV too much is also bad for our eyes.This is the main cause that leads to short-sightened.
All things considered,everything has two sides,advantages and disadvantages.Television will be useful to us of only we know how to use it correctly.
Advantages:
When you move to different places in your lifetime, you gain more experience from living among different kinds of people, eating different food, and working different types of jobs for different companies. You learn how to talk to and befriend wit all kinds of people. You'll have an awesome resume because of the many jobs and experiences you gain from different companies. Life won't be bored to you, because everything is constantly changing for you.
Disadvantages:
When you move around often in your lifetime, you would have to pack and unpack everything you own in your house. This takes a lot of time. Moving around too often doesn’t let you develop a good and trustworthy relationship with others. You have to constantly adapt to the changes when you move to a different place. This might stress you out in the long run.
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