Việt tự thắc mắc điều này cũng đã hơn 1 tuần rồi, đặc biệt là khi thấy phong trào ở Việt Nam rầm rộ quá, từ báo chí, lên đến facebook. Liệu đây có phải là một hành động thực sự có ý nghĩa, thực sự giúp cho Trái Đất, hay cũng lại làm cho người ta cảm thấy bớt áy náy chứ chẳng có tác dụng quái gì như nhiều phong trào khác. Mang tiếng là đang học Tiến Sĩ của một chương trình kĩ sư (Hóa), mấy phép tính này tương đối đơn giản nên không lẽ mình không làm được.
Trước khi bắt đầu, có bao nhiêu người ở đây biết được mục đích của ngày Trái Đất là gì ? Tại sao phải tắt đèn ? Trả lời chung chung kiểu như để “cứu Trái Đất” thì kể như không biết. Ý tưởng thì có một số, nhưng hai cái chính là “gíup cải thiện môi trường bằng cách giảm lượng CO2 thải ra khí quyển” thông qua “giảm tiêu thụ tài nguyên dầu dùng sản xuất ra điện”.
Loading ...Sau một hồi google, hóa ra đã có người làm phép tính này trước mình. Để tạo ra được lượng ánh sáng bằng với 1 bóng đèn 40W, bạn phải sử dụng đến 40 cây nến, thải ra lượng CO2 gấp gần 10 lần so với CO2 thải ra trong quá trình sản xuất điện + bóng đèn. Kết quả này không có gì là ngạc nhiên. Đốt nến để cung cấp ánh sáng là một giải pháp có từ thời Trung Cổ, hiệu suất rất thấp vì đại đa số năng lượng bị hao phí dưới dạng nhiệt. Dĩ nhiên, hiếm ai muốn thay thế ánh sáng điện bằng cách đốt 1 lúc 40 cây nến, mà chỉ cùng lắm vài cây. Như bóng đèn CFL nhà Việt, cỡ 12W, thì để bằng lượng khí thải CO2 chỉ cần cỡ 3,4 cây nến.
Tóm lại, giải pháp này không phải là hòan hảo như nhìêu người tưởng. Đối với một nhà có vài người, rất có nhiều khả năng thay đèn điện bằng nến sẽ chẳng giúp gì Trái Đất cả, mà có khi còn hại. Còn đối với những bạn này, câu trả lời sẽ chắn chắn là hại. Nhưng Trái Đất có là cái gì mà phá hỏng cơ hội chụp ảnh tuyệt vời này ? 
Giờ Trái Đất là một ý tưởng hay, có chủ ý tốt, là dịp để mọi người suy nghĩ về ảnh hưởng của những hành động của mình lên môi trường. Tiếc là nhiều người quên mất, hay không biết, mà lại đi chạy theo những hành động chỉ mang tính chất tượng trưng, vô nghĩa.
01/04/2010 at 11:04 am
1. First of all, you dont need to be a PhD chemical engineer, studying in United States to be able to do those calculations. So you dont need to brag too much about it. ( or yourself)
2. Secondly, there is not such thing called “perfect solution” for any problem. Whether you follow perfectionism or relativism, “being perfect” should rarely be used.
3. Third, it might be satisfying and enjoyable for you to criticize people but remember that people always have flaws including you (maybe even much more than others). If you can do a small thing like classifying the medical needles for people who need them, why cant people do small thing like lightening the candles to help protecting the environment? People do things for a reason, whether it is not appealing to you or not, you are in no position to judge them.
4. There is nothing wrong with people taking pictures whenever they want, wherever they like, even when they do that when doing sth else. How do you know for sure that “Còn đối với những bạn này, câu trả lời sẽ chắn chắn là hại.”????? whether it really causes harm, how sure are you that you dont do other things that cause even more dramatic harm?
Please be reminded:
“If you have no will to change it, you have no right to criticize it”
“When you judge another, you do not define them, you define yourself.”
01/04/2010 at 11:47 am
haha, someone is having his/her period today. if not, that mood swing really needs to be checked by a doctor.
1. i said that a ph.d chemical engineer has to be able to do the calculations. i never said that only a ph.d chemical engineer can do the calculations. can you read vietnamese, sweetheart ?
2. “being perfect” might not always be possible, but it should always be the goal people aim at. if you settle for less right from the beginning, don’t do it. your half-hearted attempt is a waste of time, yours, and others.
3. actually, in this world, i have the right to criticize anyone I want, as long as my criticism is correct. if you are afraid of people hurting you, remain in your closet, don’t go out. it’s that simple! sure, i am not perfect, and when people criticize me, i listen, and try to fix my own weakness.
people do things for a reason, that doesn’t mean what they did was right. the prime example is, lighting candles to help “protect” the environment. is it right ? not always, as i wrote in my post. did you even read it before start venting ? if you can’t even think about an issue by yourself, judging its merit on your own instead of blindly following other people’s footstep, you will not go very far in this world.
4. i am sure that’s not helpful. you know why i know and you don’t ? because i use my brain to evaluate the situation, while you don’t seem to. look at the number of candles on the ground.
at the end, if you do something knowing that it is not going to solve anything, aren’t you the one who try to use the attempt, not the result, to brag with your friends, sweetheart ? if you want to have a good time with your friends, go ahead, but don’t bullshit to me about saving the environment, something you don’t know, or don’t want to know, whether it is true or not.
also, part of my research might potential applications in green technology. i recycle most of the plastic bottles that i use. so yes, i do care about the environment. i show that by the results of my action, not my words.
i don’t usually answer to mis-guided comment like this, since i doubt that you would comeback and respond. but heck, might as well write down my 2 cents.
01/04/2010 at 12:51 pm
1. You are very interesting, Viet! I wonder how come you were educated by American education but you still have a very unprofessional way of arguing and responding to comment. Whether he/she has a period is a personal and sensitive issue. What a good way to start a confrontation! Bravo for your self-calling “Ph.D”. Maybe you need to work on your arrogance first and then your education? Sure, people like you can only welcome praise and agreement but cannot withstand criticism. Not even a bit! Yet you said that I and other of millions of people who have the slightest modesty about themselves are afraid of being hurt? Nonsense! If I am afraid of getting hurt, I would never come back and give this last comment.
2. Of course, there is nothing wrong of trying to be perfect. Nothing indeed. However, if you want to try for that, at least you need to know that true perfectionists work on themselves, criticize themselves (and being modest too) in order to perfect themselve, They probably dont have so much time going around, sticking their noses into others’ business. And I am so sorry but putting people down by saying that they aim for less than you might not be a good start to become a perfectionist. Not that you say you are right then others are wrong. I wish you all the luck trying to be a mere one! Sounds so unlikely tho …
3. “Actually, in this world, i have the right to criticize anyone I want, as long as my criticism is correct.” Agree! Totally! because it is analogous to saying “I have the right to be a fool as long as the proverb “Any fool can criticize, condemn and complain.. and most fools do” is correct! haha, you belong to the majority too. You need to realize that there are two types of criticism, constructive and destructive. And it seems to me that you favor the later. Yes, your choice of course, as you have your own free will to do whatever you think is correct, without even knowing that it is not you who determine your criticism is right or not. Remember that! (not that you say you are right means that you are right!)
4. I can see how you can judge the merit of an issue on your own. Lighting the candles is bad or not, “not always” so there are always two sides of an issue. Not totally wrong yet not totally right. However, if you think of the issue “protecting an environment” is a one or two-day issue then probably, people have figured out how to solve it long time ago. No need to way for you to comment. This is a contributing action that raise people awareness of how they use electricity. Yes, one day means nothing but the awareness that it brings to people might help in the long run. Maybe it is just a temporary action to wait for people like you who can utilize your knowledge (at the right place) to help green the world.
5. You say you use your brain to evaluate the situation but you cant see that the action does not aim at only one day in a year. Or maybe your view is not far enough to see that many things happening in this world have an indirect effect rather a direct one? Or maybe it is not because I dont use my brain but somebody’s brain is dysfunctional once in a while?
6. Thanks so much for responding to my previous comment, of course it is mis-guided because it is full of criticism toward you. And you can not tolerate it. (like many of other people). Then dont do what you dont want others do to you. Criticize with constructiveness please. Well, didnt you mean that your argument worth only 2 cents??? .
7. I am not a sweetheart unless you are gay
Goodbye…
01/04/2010 at 1:13 pm
wow, this long of a comment and i still don’t see you making any point against any of my arguments, or my conclusion, instead of just attacks after attacks. i am not even going to bother to discuss your accusation of me being arrogant. Whether it is true or not, it has nothing to do with the point at hand: “Thay đèn điện bằng nến có phải là giúp cho Trái Đất ?”
oh well, i didn’t expect much. i’ve seen this type before, taking advantage of the anonymity on the internet to talk nonsense. critical thinking is hard. just can’t waste my time when people choose not to read before they start the argument, or respond with substances. they need to learn it on their own.
let’s just leave it here. others can read and make their own judgment. just don’t let other people know who you are.
*in part of the american heartland, sweetheart does not contain any gender connotation.
02/04/2010 at 2:18 am
Mình cũng tham gia giờ trái đất. Tắt hết đèn, Tv, quạt, máy tính (trừ tủ lạnh
). –> Tối, nóng, và ban đầu thì chẳng biết làm gì cả (không tham gia các hoạt động chào mừng gì cả), nhưng rồi lại tìm được cảm xúc giống như nhà thơ Nguyễn Duy từng viết:
Thình lình đèn điện tắt
Phòng building tối oi
Vội bật tung cửa sổ
Đột ngột vầng trăng tròn
–> Mình chẳng biết thực sự giờ trái đất có cứu được trái đất khỏi những thảm họa hiện nay không, ô nhiễm môi trường, nóng lên toàn cầu, vũ khí hạt nhân…. Nhưng mình biết giờ trái đất có thể giúp ích cho con người (dù có thể chỉ là trong 1 tiếng), sống thảnh thơi hơn trong 1h trái đất, thấy cuộc sống đơn giản mà thật đẹp
Hai bạn cứ tiếp tục. Xin lỗi bỗng xen vào một comment nhảm nhảm
05/04/2010 at 12:36 am
I totally agree with Viet. I don’t see anything valuable from somebody’s comment. He didn’t solve any problem. It’s almost an ad hominem fallacy. He should be so much more open-minded.