It would have a massive effect. Transport (car) emissions are one of the larger - and growing - sources of emissions.
And we can’t hide behind “But the corporations…” because ultimately what they produce gets used by us.
So to answer your question: riding a bike when Global Capital wants you to keep buying cars and pumping oil into them is one of the best acts of defiance you can make
Plumbers don’t carry massive heavy plant. But I know you were just picking a concrete example of a business there so let’s not dwell on that particular case. The real point is that if a business causes damage to the roads that has to be repaired, it should contribute an appropriate amount. If that makes the cost of doing business more expensive, that just has to get passed on to the customer - who, ultimately, is the one having the heavy stuff transported
Here in the UK, I’ve seen bloody sushi restaurants and hairdressers drive branded pickup trucks FFS. No tax exemptions for businesses. As another poster noted, the damage is being done and needs to be paid for - it doesn’t magically not matter because it was done in the course of somebody using the road for their business
2 and 3 are massive. I’m on Mastodon, but am having a much better time on Bluesky. Mastodon is full of gatekeeping and policing and people complaining - Bluesky is just fun and interesting, like Twitter 12 years ago
At this stage it’s a trope that people imitate, perhaps without really thinking about it. Originally it was almost certainly an ironic joke about the value of the medals, playing on the old-fashioned bite tests that would be used for for items of dubious worth
This is greenwashing. Global aviation uses almost 100 billion gallons of fuel per year. If we even began to address a fraction of that with magic new fuels (which won’t happen) it would require incredible amounts of growing, and if we had that sort of amount of agricultural capacity available on this planet, capable of producing crops at a price the aviation industry is prepared to pay, we wouldn’t have any hunger on the world.
Don’t fall for this. There isn’t such a thing as green aviation. I’m not saying there should be no flying, but we can’t carry on as we are and magic away the consequences. In particular, don’t fall for the snake oil salesmen trying to distract you with appealing non-solutions