David Keith Archives | CleanTechnica

Climate Change

Harvard Profs Plan Geoengineering Experiment, Igniting Ethics Debate

Researchers at Harvard plan a geoengineering experiment injecting calcium carbonate dust high over the Southwestern US to see if it can help lower the...

Steve HanleyJuly 24, 2020

Biofuels

CleanTechnica Report: A case study into a technology that should be set aside until 2050, Carbon Engineering’s air-to-fuel fig leaf

Researching air-carbon capture for use post-2050 remains a very good means of establishing the intellectual capital and basic technologies for when it makes sense...

Michael BarnardOctober 28, 2019

Clean Power

Oceans Need Geoengineering, Not The Atmosphere

Solar geoengineering is a bandaid on the symptoms, not a cure for the causes. It's like putting out the fires caused by an arsonist...

Michael BarnardJuly 17, 2019

Climate Change

“Dimming The Sun” — The Killer Argument For A Profoundly Dangerous Climate Fix

A handful of scientists want to dim the sun to cool the planet. A recent debate shows the idea is perilous, impractical — and immensely appealing.

Nexus MediaMay 3, 2019

Cars

Chevron’s Fig Leaf Part 7: Carbon Engineering’s Fuel Is At Best 25x The Cost, 35x The CO2 Emissions Compared To An EV

Carbon Engineering will produce transportation fuels that cost 18-25 times more and have 22-35 the CO2e emissions as just using electricity in an EV

Michael BarnardApril 27, 2019

Cars

Chevron’s Fig Leaf Part 6: Carbon Engineering’s Air-To-Fuel Plan Is Even Worse

Carbon Engineering is planning to build high-cost and comparatively high-emission transportation fuels by combining their expensive CO2 with hydrogen which they will get via...

Michael BarnardApril 26, 2019

Climate Change

Chevron’s Fig Leaf Part 5: Who Is Behind Carbon Engineering, & What Do Experts Say?

Air carbon capture, especially as Carbon Engineering is doing it, is a fig leaf for the fossil fuel industry.

Michael BarnardApril 20, 2019

Climate Change

Chevron’s Fig Leaf Part 4: Carbon Engineering’s Only Market Is Pumping More Oil

Carbon Engineering's solution is only useful in tapped-out oil wells and as greenwashing for fossil fuel companies.

Michael BarnardApril 19, 2019

Climate Change

Chevron’s Fig Leaf Part 3: Carbon Engineering’s Scale & Power Problems

Carbon Engineering's solution would require 2-kilometer long, 20 meter high walls of noisy fans to capture 4 orders of magnitude less carbon than would...

Michael BarnardApril 14, 2019

Climate Change

Chevron’s Fig Leaf Part 2: Carbon Engineering Burns Gas For 0.5 Tons Of CO2 For Each Ton Captured

Carbon Engineering's solution is a natural gas hog that produces a half ton of new CO2 for each ton captured from the air.

Michael BarnardApril 13, 2019

Climate Change

Chevron’s Fig Leaf Part 1: Carbon Engineering Burns Natural Gas To Capture Carbon From The Air

To scale to an inadequate million tons of CO2 a year, the company would need 2,000 two-meter fans blowing air into contactors in an...

Michael BarnardApril 12, 2019

All posts tagged "David Keith"

Climate Change

Harvard Profs Plan Geoengineering Experiment, Igniting Ethics Debate

Biofuels

CleanTechnica Report: A case study into a technology that should be set aside until 2050, Carbon Engineering’s air-to-fuel fig leaf

Clean Power

Oceans Need Geoengineering, Not The Atmosphere

Climate Change

“Dimming The Sun” — The Killer Argument For A Profoundly Dangerous Climate Fix

Cars

Chevron’s Fig Leaf Part 7: Carbon Engineering’s Fuel Is At Best 25x The Cost, 35x The CO2 Emissions Compared To An EV

Cars

Chevron’s Fig Leaf Part 6: Carbon Engineering’s Air-To-Fuel Plan Is Even Worse

Climate Change

Chevron’s Fig Leaf Part 5: Who Is Behind Carbon Engineering, & What Do Experts Say?

Climate Change

Chevron’s Fig Leaf Part 4: Carbon Engineering’s Only Market Is Pumping More Oil

Climate Change

Chevron’s Fig Leaf Part 3: Carbon Engineering’s Scale & Power Problems

Climate Change

Chevron’s Fig Leaf Part 2: Carbon Engineering Burns Gas For 0.5 Tons Of CO2 For Each Ton Captured

Climate Change

Chevron’s Fig Leaf Part 1: Carbon Engineering Burns Natural Gas To Capture Carbon From The Air