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.

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.