How were you able to tell whether someone is spiritual by looking at them? Are they suppose to display certain clothes or jewelry to distingish someone being spiritual? I've noticed some pagans don't bother to wear any jewelry pertaining to their beliefs. I know I don't. That doesn't mean they're not pagan. Same for spiritual people. And helping the environment and conservation group can be a spiritual experience. Especially for those who view the Earth sacred. Some are even calling the Earth a Goddess. Science has been able to prove that Earth is a living organism further legitimizing an existential deity, Gaia.
I believe many don't discuss these topics is because many spiritual seekers want to improve their lives, and religious followers are more concerned with an outside force to arrive to 'save them' from the 'end of times'.
But there are some people making a difference in nature regardless whether they're spiritual or not.
“People will believe a big lie sooner than a little one, and if you repeat it frequently enough, people will sooner or later believe it.”
― Walter C. Langer