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The natural world. Looking pretty for 3.5b years.

Time to Reconsider Geoengineering?

Time to Reconsider Geoengineering?

Author: Hugh Bollinger/Wednesday, April 5, 2017/Categories: wildlife conservation, video, marine life, sustainability, environment, climate change

   David Keith, Paulson School of Engineering (credit: Harvard)

Is it time to reconsider the use of geoengineering as a potential tool to reduce the risk of run-away climate change? Some people think so.  Geoengineering is defined the deliberate large-scale intervention in the Earth’s natural systems to counteract climate change. The unproven collection of technologies can take many forms: seeding the open ocean with iron dust to grow more photosynthetic algae; spraying aerosols in the upper atmosphere to create more cloud cover; capturing and sequestering CO2 from industrial plants to bury deep underground; and a SciFi concept to construct giant "sun screens" in space to reduce solar radiation. Few geoengineering trials have been properly tested at scale and all carry risks but the rate of CO2 atmospheric affects are already being felt, not mid-century as was predicted predicted by the climate modelers.

David Keith at Harvard has been a proponent of using geoengineering for more than a decade but now he is receiving more attention for his ideas stated during an early TED presentation:

Sometime the risks out-weight the rewards while other times it is the reverse. The issue becomes: Is it time? Who decides? Who pays?

WHB

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