[ogre_codes]

It feels like within the next 20 years we are going to have a good handle on “green” power to fixed locations. The tricky piece we have left is how do we move people and freight over long distances.

EVs can do a decent job of transporting a few people a short distance, but aircraft and long distance freight has a whole other set of issues.

Look at container ships, one of the biggest polluters and sources of carbon on the planet. How do you remove the need for massive amounts of diesel on those?

How about passenger and air freight? How do we eliminate all the CO2 from jet fuel? In the US we are terrible at infrastructure, but do we invest in a super-train system?

This is likely the next big challenge.

[dkjaudyeqooe]

If you talk to Airbus, the current plan is hydrogen, which is emission free, besides water. Since you can extract it from water by electrolysis, there is an essentially endless supply, assuming you have endless clean electricity.

[ogre_codes]

Hydrogen power is fundamentally a power storage technology. It makes sense to use H2 for that. I've seen some technology that transforms CO2 into jet fuel which is another somewhat carbon neutral technology.

[blake1]

Container ships are massive emitters of some pollutants like SO2, but not CO2.

Sources usually put the carbon number at around 3%.[1] this number has been rising in part because the denominator, global carbon emissions, has been falling as power has been emitting less.

[1] https://www.transportenvironment.org/what-we-do/shipping-and...