Our wilderness areas would be a desert without trees. This detailed illustration splits a tree into its components with detailed scientific labeling to highlight its life-giving processes - photosynthesis, aerobic respiration… Black ink on American Apparel Men's T-Shirt | Heather Grey | All our inks contain no metals, or harsh chemicals. • 4.3 oz. • 100% ringspun combed cotton fine jersey. • Hand printed in Estes Park, CO.