40% of traffic is for petrochemicals, which according to this article is coal, oil, gas, and things derived from them, which would include fertilizer and plastics and probably some other stuff too like industrial lubricants, asphalt etc. Not just fossil fuels, so not all that 40% would be affected by a switch to renewable energy. It's also worth noting that building out renewable energy generation involves shipping a lot of hardware around the globe as well.
Another way to look at it: the shipping industry will take a beating while everyone transitions.
If anyone is left wondering why there's so much institutional resistance to changing our energy diet, its institutions like this that are lobbying and generating the propaganda behind it. Energy companies are just one faction.
If we switched to renewable energy, the cost of coal and oil would crash, but it wouldn't drop to zero. Wealthier countries would stop producing oil locally and shipments would still circle the globe from countries desperate enough to keep producing at lower profits, to countries that cannot affort the more expensive renewable infrastructure.
That's not a reason not to switch. We just need to be prepared for the reality that no single solution will resolve all our problems. Conservatives and energy barons will fight tooth and nail, and will point to the new problems as evidence that we never should have switched. was
Fun vaguely related fact: the 1800s are often hailed as the century of steamships, but in reality steamships had pretty short range and required frequent re-coaling in order to get anywhere and back. The coaling stations around the world were mostly stocked by sailing ships since there was no way to economically transport coal by using vessels that burned coal for their propulsion. So it's more accurate to say that the worldwide transportation revolution of the 1800s was a steam/wind power hybrid.
Why don't we just have one or two very big ships, powered by nuclear reactors. Like, 40-50 kilometers long each, with hydrofoils, top speed just under mach one. Zip around and deliver everyone's shit with big deck-mounted gauss guns that fire packages right to your doorstep as the ship screams past the nearest coastline.
No, they wouldn't. Capitalism is driven by supply, not demand.
If by some magic we switched to renewables over night, the owner class would open or expand another market to keep those ships moving.
As nice as it would be, a not insignificant amount of coal being transported is destined to steel production. Steel is iron + carbon, and the easiest source of carbon is coal. Steel is pretty important, so that's not going away anytime soon. I wonder if carbon capture could make a product that could be used to replace coal here though, and fairly effectively sequester the carbon in an actually useful form?
Smaller and cheaper units are becoming available as individuals as well. I might try to put something like this up, one at each corner of the home and then have battery storage.
Yoooo! Devils sign! Stop the baby eating atheists! Stop oil and gas production now and adrenaline-o-chrome something something. I dunno, I'm not good at making up woowoo but someone take over and spread this.