The Sierra Club-Palo Verde Group Meetup focuses on conservation activities and hikes organized by the central Arizona based Palo Verde Group of the Sierra Club. You're also invited to join the Meetups listed below
The Meetup site for the Arizona Sierra Club chapter, called the Grand Canyon Chapter, can be found here.
An associated Meetup site addressing alternative energy issues is here.
A full list of Sierra Club outings, activities and meetings in Arizona can be seen here.