| || ||Thread Tools||Search this Thread|
|8th December 2009, 15:32||#16|
Senior - BHPian
Join Date: May 2007
Thanked: 1,542 Times
Poor countries do not contribute as much as rich and developed.
2) India is 4th biggest polluter behind China, US, Russia. This is because of poor road infrastructure and corrupt government. In India there are many firms not adhering to norms.
About solar heater, well we have second one installed at home. The first one was installed before we shifted here and we sold off that for a new one.
Here I easily tell you that cost overall will increase if the design is not efficient. And maintenance ( if required in certain designs ) is expensive or next to impossible. The new is not as efficient as old one.
This is just good on paper but in reality a few complexities exist. Space is one of them.
There is one more heater on some large stand in shape of parabola. The focus is where we keep the object we want to get heated, but is impractical to use. One has to constantly adjust the equipment so that lights the object remains in focus.
About solar lights, we have 4 units of them installed, but none of them are currently operational. Regular maintenance is cumbersome and not possible considering the work schedule, etc.
The only way out now is increasing green cover. Nothing else is going to help. Just this thing of increasing green cover. Some students in my college were doing some sort of research on this and stated that Neem trees are the best options one can have right now. Planting them in 2008 would have given result in 2011-12. There are many places where they can be planted like side of roads, on the boundary of lets say a party plot.
They said that its the only tree that will grow a bit faster than others and can stand in reasonable winds also.
Reusable products are always not in reach of everybody.
How can you that railways is the most efficient ? A 60 ton bogie carries around 70 or 72 passengers. Lets say that a train is overloaded and no. of bogies is 12. Lets say 120 passengers in each bogies, so total no. of passengers = 1440. Average weight = lets say 75 kg. So in all 108 tons of human weight. Lets increase that to 100kg with luggage or whatever. So total weight of humans = 144 tons.
Now total no. of bogies = 12. Total weight of bogies = 720 tons. So 720 tons carrying around 150-200 tons does not make sense to me.
The most efficient is bus in this case. Acceleration will use less energy than train and is overall better than Train. Trains use electricity and in order to produce electricity some pollution is there ( though this is true for diesel also ).
Trains are built in a way that they last long, not for energy efficiency.
|8th December 2009, 15:44||#17|
Join Date: Nov 2008
Thanked: 0 Times
|8th December 2009, 21:07||#18|
Join Date: Nov 2007
Thanked: 402 Times
I wonder...who are we to decide what is good and what is bad for the earth?
The earth has been here long before we came to the picture and I suppose that it will still be there with or without us. The paranoia is probably because we are at the receiving end or at least we see ourselves at the receiving end.
As someone has already pointed out, the earth has seen a lot and has shown great resilience and will in all probability continue to do the same.
At the same time, it is a good idea to try and make the world we live in a better place to live in. In that, I do support the activity around Copenhagen.
|8th December 2009, 21:34||#19|
Senior - BHPian
Join Date: Feb 2005
Location: cincinnati, jabalpur,chennai
Thanked: 184 Times
1. initial cost of construction, rail cars, engines, and the biggest of all, rail tracks.
2. huge yards need to repair and maintain them.
3. running them at ridiculously low occupancy in developed countries. Yes, only because they love to live in luxury. redundancy comes at a cost.
|8th December 2009, 23:31||#20|
Senior - BHPian
Join Date: Dec 2007
Thanked: 591 Times
You know it surprises me that we're this brazen about the earth. The earth has survived fires and what not and will continue to do so? Am I really reading this kind of bullshit? And then, there are people like Jeremy Clarkson. He really needs to stop talking about things he hasn't got the first clue about. And his viewers would do well not believe every word he says.
The earth is changing and it is a fact. The icecaps are melting at an alarming rate. Global temperatures are certainly rising too. Here's an article from the BBC. It was published today! BBC News - This decade 'warmest on record'
What the scientists and environmentalists cannot prove with absolute certainty is whether humans are responsible for this or not. But even the most ignorant chap here would agree that there's a damn good chance that it is, at the end of it all, our fault. And when there is a chance, no matter how slight, that we're destroying the planet, its about time we woke up and did something about it. Because if it is destroyed a few decades from now, we've got nowhere else to go. And imagine how idiotic we'd look if it turns out to be our fault but we firmly refused to believe that we might be responsible.
By all means, have a debate about how to go about cutting emissions with as little economic impact as possible. But a debate on whether we should even bother acting is ridiculous. A quote that I read a while back comes to mind. "Genius has its limitations, but stupidity is not thus handicapped". What is remarkable is how true it rings.
Last edited by McLaren Rulez : 8th December 2009 at 23:35.
|9th December 2009, 08:27||#21|
Senior - BHPian
Join Date: May 2007
Thanked: 1,542 Times
And how many stations are there ? In a 120 km MEMU trip from Vadodara-A'bad, there are many stations where a train will stop. Too many in number. This surely hurts efficiency.
2) Train cost is less, but the energy efficiency is not the best. In our cars, trucks, busses, we have rubber wheels. When the vehicle moves, the rubber sidewalls flex leading to loss of energy. This is something trains do not have thanks to metal wheels, but the weight ? Its simply too much to carry. IIRC, a wheel weight is a ton and axle weight is 1.2 ton in India. Imagine these things slowing down, braking and again accelerating.
Next, the current rail lines are overloaded. We need more tracks but that is not very easy and a lot of green cover can be lost in this. And due to increased no. of trains, many times trains have to stop in between or slow down as they donot get berth sometimes.
The biggest loss comes in the form of aerodynamics. The railway bogies and engines are more than 10-11 feet tall ( I think they are 14 feet tall ). They are too boxy and one of the reasons why they lose a lot on efficiency.
Buses are no good here, but we can have certain changes incorporated to improve aerodynamics.
Roads like Express highway and metro rail network for intercity travel will help for India.
Posted just what I had read and think.
|9th December 2009, 08:57||#22|
Join Date: Mar 2009
Thanked: 8 Times
Its not just about earth, its the existance of life form on earth. There is evidence that water did exist on some planets years ago...the same should not be said about earth after thousands of years by some aliens !
Its only human not to learn from the past and from what we discover on other planets. Things cant be stopped but most certainly can be delayed to a great extent with due care .
On a lighter note, we should concentrate on technology that would help people freeze cryogenically for a good thousands of years ! lol
|9th December 2009, 20:48||#23|
Join Date: Jun 2009
Thanked: 22 Times
1. I understand what you're trying to say.
2. I will check out film.
3. My point being that many people just find excuses to be deliberately ignorant of the damage us humans are causing around us. We have become too greedy and don't want to take responsibility for our actions. Everywhere you see mediocracy thrives, people are thinking less for themselves and let the media and other propaganda subconsciously influence the way they think and behave. If there's a documentary that is giving you a message that hey go ahead do whatever the heck you're doing, the earth will eventually take care of itself. We don't have to look at the earth as just a celestial body it's much more than that isn't it. It's home! It's where we are born , where we live, thrive and prosper. We share this planet so many wonderful life forms that never cease to facinate (you're right, new species are being discovered as we speak even now in the 21st century). If some film is prompting you to look at it as just a celestial body that will take care of itself and maybe at make us feel that climate change and mass extinction of species is a disaster but not as bad as we thought then no matter whom it is presented by, I would give it two thumbs down. However it seems that I may be judging the film without watching it. So let me get around to watching it first!
|9th December 2009, 22:41||#24|
Senior - BHPian
Join Date: May 2009
Location: Atlanta, GA
Thanked: 782 Times
First off, I am not some extremist, tree-hugging guy who seems to think that the Earth will be destroyed in a few hundred years going by the rate it is. But I am one who thinks that Global Warming is true and happening. I do not endorse extreme ideas like dumpster-living etc. But I do know that plastics and all our wastes litter the Earth. For me, it is all a bl00dy eye-sore and especially in India, it would look much more beautiful without all the pollution. I have recently been photographing sewers - yes, believe me when I say that. With my friend, we are planning to do an exhibition focussing on the beauty even amongst sewage. It has been a stink to take photos at places like this, but more than the stink it is with sadness that I see that plastics and what nots litter the sewage water. Where does this all end up? The seas - the cradle of life as we know it. And it is sad to know that dolphins and fishes suffer the pollution that was caused so many hundreds of kilometers away! And the cycle begins - from fish to other larger beings - man included.
There is no way that we can completely stop our carbon emissions. But just a small effort - for each one of us to reduce our carbon emissions in some way or the other, every single day will go a really long way. Not in saving the Earth - the Earth will withstand all this. But our life-form and most importantly - to give our children all this. I would certainly love to see my kids and grand-kids be able to breathe the lovely mountain airs and eat fresh food, fish from the ocean - without fear of contamination of any sort. Downhill it is, atleast make a decision to reduce the downward spiral - for the kids.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Queries about automatic and manual climate control||vasu||Technical Stuff||22||20th July 2018 14:30|
|I save lives, and cars save me! Glory Glory Team-BHP||Starfire||Introduce yourself||5||6th August 2014 23:23|
|Be a hero and Save the Climate at UN Climate Summit in Copenhagen December 19th||serpente||Shifting gears||0||27th November 2009 20:49|
|Spark, Santro, i10 or others - FE important - 1500kms/month, Rear seat not important||monishdesign||Hatchbacks||7||11th March 2008 12:27|