Discover and read the best of Twitter Threads about #reduceairtraffic
Most recents (3)
#Biofuels & #aviation: out of the frying pan into the fire
Biofuels are *theoretically* a feasible alternative to fossil jet fuel. But: they have countless negative side effects and their quantity will remain limited. #greenwashing
A thread on their problems and limits. 🔽🧵
Biofuels are *theoretically* a feasible alternative to fossil jet fuel. But: they have countless negative side effects and their quantity will remain limited. #greenwashing
A thread on their problems and limits. 🔽🧵
Problem 1: biofuel use is severely constrained by the sustainability and availability of biomass
It is often claimed that aviation would use only second generation biofuels derived from 'waste' sources, therefore avoiding any direct or indirect sustainability impacts. Yet the use of first generation biofuels from crops and even entire trees has not been ruled out.
#Hydrogen is touted by some as THE great climate remedy.
Parts of the #aviation industry are also telling us that we will soon be flying on hydrogen.
Why this is not true - a thread. 🔽 🧵
Parts of the #aviation industry are also telling us that we will soon be flying on hydrogen.
Why this is not true - a thread. 🔽 🧵
The basics: in order to use hydrogen as a power source for aircraft instead of kerosene it could either be burned in a jet engine or used to feed a fuel cell to generate electricity to power a propeller.
Hydrogen is produced from other energy sources, has a significant energy loss during the process and is usually stored in liquid form at −253 °C.
"Small cuts in air traffic would level off global heating caused by flying"
Good article by @katerav about an important paper by @milankloewer et al. - but with a few blind spots.
Let's explain what's missing here. Thread 🔽🧵
theguardian.com/world/2021/nov…
Good article by @katerav about an important paper by @milankloewer et al. - but with a few blind spots.
Let's explain what's missing here. Thread 🔽🧵
theguardian.com/world/2021/nov…
First of all: the article talks about a 2.5% reduction in air traffic each year. That is not a small change! Because until now, air traffic has grown at >5% per year. And it wants to continue to do so after Covid - despite rising emissions and climate emergency.
What is important is that aviation cannot become climate-neutral through technology. All "alternatives" deliver too little and have disadvantages. See our new factsheets:
