Go Green: Geoengineering – The Unnatural Solution
Text by Andy Isaacson
Earlier this year, a team of scientists dumped several tons of iron into the Atlantic Ocean off the Chilean coast, hoping to fuel a massive algae bloom (algae eat iron), which would in turn suck up massive amounts of CO2 from the air. Instead, shrimp wolfed down the algae, causing yet another wrinkle in the complex world of geoengineering.
Expect to hear that buzzword more often. Generally speaking, geoengineering is the large-scale manipulation of the environment to counter climate change. And though the concept has been around for decades, worsening warming trends are pushing it into the spotlight.
Even President Obama’s science and technology adviser, John Holdren, has expressed interest in the subject. Proposed methods for cooling the Earth include building carbon-scrubbing towers that would capture CO2 from the atmosphere, and shooting droplets of seawater into clouds to enhance their reflectivity. In September, Britain’s Royal Society will release a report on which geoengineering ideas (e.g., a plan to reflect solar radiation by timed release of sulfur dioxide into the stratosphere) deserve further research. Many scientists worry that attempts to fool Mother Nature will create bigger problems than those they aim to solve. “It’s best to start testing these things gradually, so if something bad happens you can back off,” says Ken Caldeira, a Carnegie Institution climate scientist who champions the sulfur dioxide idea. But if a true emergency were to arise? “I think we could be putting particles in the stratosphere next year,” Caldeira says. “The technology is there.”
Go Further
Animals
- This ‘saber-toothed’ salmon wasn’t quite what we thoughtThis ‘saber-toothed’ salmon wasn’t quite what we thought
- Why this rhino-zebra friendship makes perfect senseWhy this rhino-zebra friendship makes perfect sense
- When did bioluminescence evolve? It’s older than we thought.When did bioluminescence evolve? It’s older than we thought.
- Soy, skim … spider. Are any of these technically milk?Soy, skim … spider. Are any of these technically milk?
- This pristine piece of the Amazon shows nature’s resilienceThis pristine piece of the Amazon shows nature’s resilience
Environment
- This pristine piece of the Amazon shows nature’s resilienceThis pristine piece of the Amazon shows nature’s resilience
- Listen to 30 years of climate change transformed into haunting musicListen to 30 years of climate change transformed into haunting music
- This ancient society tried to stop El Niño—with child sacrificeThis ancient society tried to stop El Niño—with child sacrifice
- U.S. plans to clean its drinking water. What does that mean?U.S. plans to clean its drinking water. What does that mean?
History & Culture
- Meet the original members of the tortured poets departmentMeet the original members of the tortured poets department
- Séances at the White House? Why these first ladies turned to the occultSéances at the White House? Why these first ladies turned to the occult
- Gambling is everywhere now. When is that a problem?Gambling is everywhere now. When is that a problem?
- Beauty is pain—at least it was in 17th-century SpainBeauty is pain—at least it was in 17th-century Spain
- The real spies who inspired ‘The Ministry of Ungentlemanly Warfare’The real spies who inspired ‘The Ministry of Ungentlemanly Warfare’
Science
- Here's how astronomers found one of the rarest phenomenons in spaceHere's how astronomers found one of the rarest phenomenons in space
- Not an extrovert or introvert? There’s a word for that.Not an extrovert or introvert? There’s a word for that.
- NASA has a plan to clean up space junk—but is going green enough?NASA has a plan to clean up space junk—but is going green enough?
- Soy, skim … spider. Are any of these technically milk?Soy, skim … spider. Are any of these technically milk?
- Can aspirin help protect against colorectal cancers?Can aspirin help protect against colorectal cancers?
Travel
- What it's like to hike the Camino del Mayab in MexicoWhat it's like to hike the Camino del Mayab in Mexico
- Is this small English town Yorkshire's culinary capital?Is this small English town Yorkshire's culinary capital?
- This chef is taking Indian cuisine in a bold new directionThis chef is taking Indian cuisine in a bold new direction
- Follow in the footsteps of Robin Hood in Sherwood ForestFollow in the footsteps of Robin Hood in Sherwood Forest