Hi friends, I'm quite curious about activated charcoal. After hearing so many wonderful things about them, I intend to buy them to use at my house. But still I need to clarify some points: 1. Activated charcoal is said to be very effective in deodorizing. My question is that how long does it take for the odor to be removed? 2. Activated charcoal is said to be capable of generating negative ions. Is this true? 3. Is Activated charcoal able to adsorb carbon monoxide (CO)? Thank you for reading my question. Regards, Riscilla.