Social Media Sidebar

Announcement

Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

People say we're running out of energy. That's only true if we stick with these old 19th century technologies. We are awash in energy from sunlight.

 

Ray Kurzweil

 

Are ideas to cool the planet realistic?

RATE THIS! +8
Posted in Science on 22nd Sep, 2013 07:16 AM by AlexMuller

The deliberate large-scale manipulation of the Earth's environment, called geoengineering, could be one way to cool the Earth or help reduce levels of carbon dioxide in the atmosphere.

 
But scientists are aware that these technologies are in very early stages of development and remain untested on a global scale.
 
Although there are great risks in deliberately interfering with nature to cool the planet, some researchers say that if the concentrations of carbon in the atmosphere reach a critical stage, geoengineering might become the only way to take control of our climate.
 
On the other hand, others worry that having the technology to "reverse" climate change could be seen as a get-out-of-jail-free card and that more effort should be put on existing ways of reducing emissions.
 
Steve Rayner of the Oxford Geoengineering Programme, UK, says that there is no easy answer, but it would be "irresponsible for us not to explore the potential to understand the technologies as best we can".
 
"Throughout human history the technologies of one generation created problems for the next. We have to find some way to deal with that; it's part of the evolution of human society," he adds.
 
Geoengineering refers to the deliberate large-scale manipulation of the Earth's environment to counteract climate change.
 
There are essentially two ways of doing this.
 
The first is called Solar Radiation Management (SRM) and involves reflecting more of the Sun's rays away from the planet back into space.
 
One proposed method of SRM involves putting sulphur aerosols into the high reaches of the atmosphere.
 
This mimics what occasionally occurs in nature when a powerful volcano erupts. For example, the Mount Pinatubo eruption in 1991 injected huge volumes of sulphur into the stratosphere. The particles produced in subsequent reactions cooled the planet by about 0.5C over the next two years by reflecting sunlight back out to space.
 
Using SRM would only address the symptoms and does not tackle the issue of rising concentrations of carbon dioxide (CO2).
 
That is what the second option would aim to address by removing the CO2 already present. A number of ways to do this have been proposed; these approaches are known as Carbon Dioxide Removal (CDR).
 
This would tackle the root cause of the problem, but Prof Rayner says, it would be very slow to have any effect and would require extensive financial investment.


Read original article » Back to category

Comments

Author: Guest
Posted: 2013-10-24
+0
MddyEO Wow, great blog post.Much thanks again. Great. Reply


 

Recent headlines

  • Posted in Science on 2017-10-22 04:22:31
    Blue Origin’s Breakthrough Means SpaceX Finally Has a.....read more
    Posted in Business on 2017-10-22 04:17:51
    Bitcoin boom prompts growth of coin-mining malware..read more
    Posted in Science on 2017-10-22 04:14:04
    MDMA Advances Another Step As Tool to Treat PTSD..read more
    Posted in Science on 2017-10-21 02:03:22
    Japan Just Discovered the Perfect Spot to Build a Moonbase..read more
    Posted in Hardware on 2017-10-21 01:52:51
    Up to 200 pound pieces of China’s Space Station could.....read more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in about.....read more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for commercial.....read more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 Downloads..read more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into new.....read more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs,.....read more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for commercial.....read more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short Sighted..read more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, but.....read more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in about.....read more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target mitochondria..read more

Recent Blog Posts

  • Posted by AlexMuller
    Scientists probe Neptune's depths to reveal secrets of icy.....read more
    Posted by AlexMuller
    New terahertz imaging approach could speed up skin cancer.....read more
    Posted by AlexMuller
    Rebutting the claim that antidepressants do not work..read more
    Posted by AlexMuller
    Artificial neural networks decode brain activity during.....read more
    Posted by AlexMuller
    Four Earth-sized planets detected orbiting the nearest.....read more

Login to your Account

Login to your PlanetTech Account here

Username:
Password:
Remember me
or

Create a New Account

You just need username and password

The following errors occured:
Username:
Email:
Password:
Verify password:
Remember me