According to scientists, carbon monoxide (CO), a tasteless, colorless and odorless gas, is not only a danger to the environment but also highly toxic to human beings. Found in the exhaust of vehicles and generators, CO has been dubbed the "silent killer" because excessive inhalation is lethal, poisoning the nervous system and heart.
Now, in a surprising twist, Prof. Itzhak Schnell of Tel Aviv University's Department of Geography and the Human Environment has discovered that low levels of the poisonous gas can have a narcotic effect that helps citydwellers cope with other harmful environmental factors of an urban environment, such as off-the-chart noise levels. This finding indicates that CO, in small doses, is a boon to the well-being of urbanites, better equipping them to deal with environmental stress.
The research has been published in the journal Environmental Monitoring and Assessment.
Gas combats noise pollution
The discovery was made in the context of a wider project designed to study the impact of environmental stressors on the human body. Most environmental observation stations, explains Prof. Schnell, are located outside stressful city centers, where pollutants such as vehicular and human traffic are significantly decreased, resulting in distorted data.
Instead, Prof. Schnell and his fellow researchers wanted to measure how people living in an urban environment confronted stressors in their daily lives. They asked 36 healthy individuals between the ages of 20 to 40 to spend two days in Tel Aviv, Israel's busiest city. The test subjects travelled various routes to sites such as busy streets, restaurants, malls and markets, by public and private transportation or by foot. Researchers monitored the impact of four different environmental stressors: thermal load (heat and cold), noise pollution, carbon monoxide levels, and social load (the impact of crowds).
Participants reported to what e
|Contact: George Hunka|
American Friends of Tel Aviv University