For the majority of people to be able to use their car less MAJOR change is needed. Change costs money and requires political will. We don't have enough of either.
So it becomes a personal responsibility. For some people environmental concerns are massive, for others not so much.
I put the environment in my top three for decision making all the time but have my weaknesses too (I love gadgets - mostly solved by buying second hand)
We always reduce our car use (we're stingy with petrol you see). We car share where possible. We trip chain all the time to ensure maximum bang for our carbon emission buck. We've managed with only 1 car for 13 years. No buses here, no safe route to school for walking without a diversion.
We recycle so much our landfill bin only goes out (half full) once a month.
We reduce our meat consumption and shop local. We pick energy efficient ways of cooking (rarely use our oven).
Our energy bills for gas and electricity is £80 pcm (4 person household, 3 bedrooms)
I make my own washing powder. Don't have a tumble dryer.
I bf and cloth nappied my DC. I use a moon cup.
Recycle batteries, lightbulbs and plastic bags (not the shopping kind, the food kind)
We haven't flown since 2016. It'll be next year or 2022 before we fly again.
Don't indulge in fast fashion. Stopped using my hairdryer. Bought a carpet sweeper to cut down on use of vacuum.
There is so much more we could do. I'm not perfect. It's a family passion. I want others to do the same but I cannot expect it of them.
I have the privilege of being able to do these things because it takes time, planning and even money. Not everyone has the same resources.
Someone might use their car often but be an green angel in other areas of life. I have a friend who holidays a lot (preCovid) but she is a lifelong vegan and has never had any children. So she is probably greener than me!
My cousin has composting toilets and is off grid for water.
Everyone is different. We must all do our best. Someone else's best is not the same as yours OP.
🖖 live long and prosper.