If everyone just sat back and waited for others to fix things for them then nothing would ever happen. I like seeing projects like this one take off:
There are two ways to do things, a few doing a lot of work, or a many doing a little work. We each have the capacity to do a little something to make this world a better place. I love these grassroots initiatives like this.
Now, I may have solar panels, battery storage, and electric vehicles, but I think I surprise people when I say it had NOTHING to do with global warming concerns or the environment, as it was primarily a financial thing, and secondarily, it is my way to "stick it" to the "big electric" and "big fossil fuel" and achieve some degree of independence. I am saving quite a bit of money, it is far more convenient for me, and I'm living a slightly higher lifestyle. Selfish motives mostly.
The home I am designing and engineering right now will be a "high tech" off-grid home. Solar PV, solar thermal water heat, passive solar, solar water condensers, geothermal, wind turbine, an attached food greenhouse, 18-inch/46cm thick outside walls and roof of concrete and structural foam, water collection into a cistern, etc. Redundant systems. As little as possible from government and utility influence as I can get. Independence is the key.
I want some property where I can grow fruit trees, have some bee hives, hunt, fish, raise chickens,...do all the things I enjoyed as a kid at my grandparent's home. I plan on selling my excess power to the grid, and not pull from it. I plan on selling my excess food at the local farmer's market. Spend some money up front, save and make money on the back end. Take care of myself first, then give back.
We must not be afraid to invest in our futures. Sure, it costs money and work up front, but if you can get a return on investment in 5-10 years or less, you'd be silly not to.
So, you don't need to be an environmentalist, per se, but you do have the power over yourself to do something positive for your environment, even if your primary motivation is yourself. You can plant seagrass to reestablish a habitat for fish, in order to feed yourself and others, for example, but it may also enhance the general ecosystem. If you can get a "win-win" out of what you are doing, that's a great thing.