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Science & Technology

Climate change reversal 'relatively inexpensive'

November 23, 2018 | Comment icon 35 comments



Is geoengineering really a good idea ? Image Credit: CC BY-SA 2.0 Francois Roche
A geoengineering technique known as stratospheric aerosol injection could reverse global warming.
According to a new study, the cost of reversing climate change could be as little as $2 billion per year.

To reach this conclusion, researchers investigated the effectiveness of a theoretical geoengineering method designed to mimic the impact that a volcanic eruption might have on global temperatures.

Back in 1991, Mount Pinatubo in the Philippines erupted, pumping 20 million tons of sulfur dioxide aerosols in to the stratosphere and reducing the temperature of the lower atmosphere by 1 degree Fahrenheit for the better part of two years.
It has since been suggested that artificially reproducing this effect by pumping aerosols in to the stratosphere through a process known as stratospheric aerosol injection (SAI) could theoretically replicate the drop in temperature and effectively reverse the effects of climate change.

According to the new study, it would take a fleet of 100 planes flying 4,000 missions per year to achieve this at a cost of around $2 - $2.5 billion per year for the first 15 years.

The only snag is that a new type of aircraft would have to be developed for this purpose.

Given the controversial nature of geoengineering however, it remains to be seen whether enough countries would actually support this idea for it to ever actually get off the ground.

Source: CBS News | Comments (35)


Recent comments on this story
Comment icon #26 Posted by Essan 3 years ago
As regards the study - it isn't a proposal that we do something that has been discussed for decades and is generally regarded as probably a very bad idea given the known (and unknown) consequences.   It's just a feasibility study into the costs/practicalities should we decide to be very stupid.   Of course, the usual suspect have taken it entirely out of context ....
Comment icon #27 Posted by Big Jim 3 years ago
We've proven time and again that if stupidity is affordable we buy as much of it as we can get.
Comment icon #28 Posted by Calibeliever 3 years ago
Agreed. That's not what I said?
Comment icon #29 Posted by Nnicolette 3 years ago
You know Putin has released a statement about this. He believes western governments are poisoning the air on purpose with the chemtrails and this needs to be stopped, because it is causing the global warming. According to what i read.
Comment icon #30 Posted by Nnicolette 3 years ago
I hate to break it to you but i have seen enough odd formations and instances with the trails to know something isnt right and i scored 189 on my iq test. Regardless of how people here talk to me it is the same number. Thinking you are smarter than other people for following the crowd and believing what you've been told is normal, but isnt generally superior to using your own eyes.
Comment icon #31 Posted by Nnicolette 3 years ago
I do. I dont want anyone to kick off an ice age worrying about a little heat. I hate being cold i moved away from snow for a reason.
Comment icon #32 Posted by Nnicolette 3 years ago
Interesting. Never seen a flying unicorn but you know contrails are getting so abundant they are the new clouds. Something really strange happened to me last summer. Phones are getting creepy. So i was visiting my dad in a small secluded town and i saw two approaching jets. They looked like they were going to have a collision so i watched. They didnt. They began streaming a trail and made a big x over the town. As soon as the x was done they stopped spraying, both made sweeping turns and went back in the same direction leaving just a white x. What is going on up there? I live in a larger town ... [More]
Comment icon #33 Posted by Silver_Raven 3 years ago
While I don't disagree with that, there's historical evidence that it won't work. In the 1800's there were two major volcanic eruptions, Krakatoa and Tambora, both put enough material into the atmosphere to modify the global temperature by a few degrees. The results were the same for both, mass die offs, crops failed, etc. This happened on a global scale, and the temperature change was, at most, 4 degrees. What they want to do is far more significant than what these two eruptions caused, and irreversible once started. There are better methods, such as true green city projects, most of the ones... [More]
Comment icon #34 Posted by Doug1029 3 years ago
It doesn't have to be any one method.  It could be a mix of techniques.  My guess is we haven't yet invented the one we'll eventually use. Tamboura barely left a wiggle in the tree ring record in Oklahoma.  There's a mystery triplet for 1824-1826.  Maybe a delayed response to Tamboura, but probably not.  It shows up as a drought in most analyses, but I have my doubts.  Krakatoa, on the other hand, was probably the cause of the worst winter on record for the Great Plains.  They're still telling stories about how bad it was. In a "perfect" world, we would only want to drop the temps about 0.5 de... [More]
Comment icon #35 Posted by Doug1029 3 years ago
The next one is due in 8000-10,000 years.  So it's true that one is due - we're just going to have to wait awhile. Doug


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