r/nolawns has some great resources! Clover is wonderful.

Gas-powered lawn and garden equipment is responsible for 24-45% of non-road carbon emissions, about half of other forms of air pollution, and 4% of total C02 emissions. Gas-powered mowers and leaf blowers are among the least energy efficient, most polluting combustion engines in existence. Operating a lawnmower for an hour produces the same amount of emissions as driving a typical car for 500 miles.

That's not taking into account the harmful effects of monoculture grass lawns on native species and pollinators anyway. Lawns are truly one of our dumbest hobbies.