Deep Dive - "Construction is underway on a 30-foot-high steel wall along Arizona’s southern border in Organ Pipe Cactus National Monument. As several reports have recently warned, the wall will hurt many endangered desert species, from Sonoran pronghorns to cactus ferruginous pygmy owls. To understand how the wall will further fragment habitats for these already-declining plants and animals, let’s go deep with one rare species that’s at grave risk: a cactus called the night-blooming cereus." (jn) http://ow.ly/GoXW50wRIk7
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