With Climate Change, Saguaros May Disappear

Global warming sounds like it would be good for deserts, right? Not so—at least when it comes to the southwest's iconic silhouette.
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The reason and symbol of Saguaro National Park is under threat.

Here's a story about cacti under threat. Saguaros have adapted to the desert, but it turns out that the temperature increases tied to climate change aren't the issue: it's the variable rainfall, which may disrupt the fruit and seed cycle of the delicate plants. Another threat? The invasion of buffelgrass, which will only increase with warmer conditions.