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The tortoise and the hare? The race to decarbonize aviation
Explores whether aviation emissions can be greatly reduced if air traffic returns to its pre-pandemic rapid growth.
Flying on the Grid
Argues that unless alternative aviation fuels are produced using additional and renewable electricity, their use will not necessarily decarbonize aviation and could actually increase aviation’s GHG emissions.
Hungry Hungry Airlines
Critiques the Biden Administration’s approach to development of sustainable aviation fuels (SAFs) and suggests an alternative path.
What if I told you cruising is worse for the climate than flying?
Vacationers take note: Even the most efficient cruise ships today emit more CO2 per passenger kilometer than a passenger jet.
Scrub-less in Seattle, but not yet in Tacoma
Ports in Seattle and Tacoma could become leaders in the transition to zero-emission technologies by combining progressive environmental policy with their existing supply of low-carbon electricity.
Place your bets: supersonics, or zero-emission planes?
In the high stakes casino of aircraft development, it’s time for industry and governments to place their bets. Supersonics, or zero-emission planes: which will it be?
Drafting the future of clean hydrogen: Build Back Better with an additionality requirement
U.S. policymakers can strengthen the hydrogen tax credit in the Build Back Better Act by including an additionality requirement.
The paradox of sustainable biomass
Recent research suggests that sufficient European biomass resources exist to sustainably decarbonize the transport sector. However, do the numbers check out?
U.S. biofuels policy: Let’s not be fit for failure
With recent, encouraging advancements in EU biofuels policy, maybe it’s time for a whole new vision for U.S. policy.
Don’t let the industry greenwash green hydrogen
Certifying that hydrogen and efuels are produced from 100% additional renewable electricity is not as simple as it seems.
A step forward for “green” methanol and its potential to deliver deep GHG reductions in maritime shipping
“Green” methanol can provide deep greenhouse gas reductions, but not all methanol is climate friendly, and marine policies should incorporate full life-cycle accounting of emissions.
India, don’t fall for ethanol: Roadmap leads National Policy on Biofuels off track
India’s new ethanol roadmap abandons the country’s commitment to second-generation biofuels and is environmentally and economically unsustainable.