Why we need en­gines

Focus-Science and Technology - - Mega Pixel -

I read the let­ter by Steve Jones in the April is­sue with in­ter­est. How­ever, the in­ter­nal com­bus­tion en­gine does not have to op­er­ate ex­clu­sively on fos­sil fu­els. In­stead of be­ing banned, in­ter­nal com­bus­tion en­gines can ac­tu­ally en­able a zero-net-car­bon en­ergy econ­omy.

Fully-re­new­able liq­uid fu­els can be made by re­cy­cling CO al­ready in the at­mos­phere. In­stead of re­ly­ing on be­ing paid a rel­a­tively small amount to put CO in the ground, the high value of trans­port en­ergy is more likely to make it vi­able to use the air-ex­tracted car­bon to fix hy­dro­gen as ‘elec­tro­fuel’. With such

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