David Keith

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Frank Keutsch stand is a thermal vacuum chamber

An umbrella to combat warming

Research examines the possibility of spraying tiny particles into the stratosphere to block the sun a bit and cool the planet

Science|

DateSeptember 11, 2019September 17, 2019

Man giving presentation

Opening the door for scientific leaps

Star-Friedman Challenge for Promising Scientific Research funds four high-risk, high-reward projects

News|

DateMay 21, 2019May 22, 2019

Team plans industrial-scale carbon removal plant

Uses existing technology in novel ways to extract it from atmosphere

Science|

DateJune 7, 2018July 3, 2019

In the search to attenuate climate change, researchers from Harvard John A. Paulson School of Engineering and Applied Sciences have identified an aerosol made from calcite — a common antacid medication — that could reflect sunlight while repairing the ozone layer.

Mitigating the risk of geoengineering

Aerosols could cool the planet without ozone damage

Science|

DateDecember 12, 2016July 3, 2019

A new Harvard study published Monday in the journal Energy & Environmental Science finds that the supply of wind and solar power could be increased tenfold without additional storage.

Greening the electric grid with gas turbines

Massive storage not needed for renewable sources to play large ‘decarbonization’ role

Science|

DateSeptember 23, 2015

Douglas Melton (from left) presented Star Family Challenge awards to five Harvard faculty: Joshua Greene, Paola Arlotta, Federico Capasso, David Keith, and accepting for Daniel Schrag was research assistant Lauren Benson Kuntz.

Innovative faculty research receives support

Three climate change-related projects among recipients of Star Family Challenge grants

News|

DateApril 17, 2015March 8, 2019

Could global warming be overcome by releasing light-reflecting chemicals into the atmosphere? With safety and efficacy at the forefront of debate, David Keith discusses the moral and political quandaries surrounding the science of geoengineering.

Climate engineering: In from the cold

Keith says new reports will likely boost deeper look at geoengineering concepts

Science|

DateFebruary 20, 2015July 3, 2019

Scholars on opposite sides of geoengineering debated the pros and cons. Harvard Professor David Keith (right) said the time to begin research into geoengineering is now so that science will have a chance to learn about potential pitfalls before the worst of warming hits. Countering the use of geoengineering was Clive Hamilton of Charles Sturt University, who described a future where the root causes of warming are ignored while weather is controlled by corporations or governments far removed from the effects.

Geoengineering: Opportunity or folly?

Keith, Hamilton differ sharply on climate change proposal

Science|

DateOctober 29, 2013April 3, 2019

Sunset in the Arctic: A new study at Harvard explores the feasibility of using cautious and targeted solar geoengineering to counter the loss of Arctic sea ice.

Cautious geohacking

Study suggests solar geoengineering can be tailored to minimize risk, inequality

Science|

DateOctober 22, 2012

University of Calgary’s David Keith kicked off the Future of Energy speaker series focusing on geoengineering options. Geoengineered solutions to climate change fall into roughly two categories, Keith said. The first, carbon cycle engineering, includes slower and more expensive solutions. The second category, solar radiation management, includes shorter-term fixes that block sunlight from reaching the Earth and then getting trapped by greenhouse gases.

Expert: Lift taboo on Earth engineering

David Keith calls for discussion, investigation of geoengineering

Science|

DateSeptember 23, 2009