Green Spaces Alliance of South Texas continues their popular youth photography project with a workshop March 7 at Voelker Park; this month’s session is for 13 – 18-year-olds.  A professional photographer and a naturalist will be on hand to help students fully explore their natural environment through the eye of a camera lens.  The theme of this month’s class is “Air… Nature’s Transportation.”  Students may borrow digital cameras or bring their own.  All workshops are $10 – $15 per class.  For more information or to download the registration form, visit www.greenspacesalliance.org or call (210)222-8430.