When you own property, you care more about the place where that property exists because what affects the surroundings directly affects the value of your possession. That incentivizes you to care about and invest in your neighborhood, community, state, and country.
If you aren't tied to the place, it's easier to just jump ship and say "not my problem" when something goes awry. You have fewer incentives to put effort into long-term projects that improve the community since you're less likely to be there to reap the benefits.
In other words, renters are less likely to plant trees, but a neighborhood with trees is better for us all over the long term.
