What You Didn't Know About Carbon Monoxide Poisoning The effects of exposure to high levels of carbon monoxide over a short period of time are well-known, but less is known about the potential dangers of low-level and long-term exposure to CO. A new episode of Learn Something New™ by NFPA Journal® explores the phenomenon. Watch the full video: https://bit.ly/39XXGo3 | National Fire Protection Association (NFPA)