It's summer, so there are fires in Arizona. According to the air quality boffins, the current haze and smokey smell in Phoenix is due to the POCO fire in Gila County. Desert fires burning up mesquite, dry brush, and creosote tend to create acrid smoke that can still be smelled by a bicycle commuter even hundreds of miles away. Just another way that one person's actions, dropping a lit cigarette, failing to put out a campfire, or any of the other dozens of ways these fires get started, can affect other people both near and far. I'm not sure that these neatly coiffed palm trees can actually sweep the sky. But they sort of look like they could.