Health Hazards in Greenhouses
Since 1961 there has been a rap id increase in the "practice of adding carbon dioxide (CO.,) to greenhouse atmospheres, to pro mote plant growth (14). Current sources of carbon dioxide include pure liquid carbon dioxide, "dry ice", and the combustion products from burning kerosene, propane or natural gas in commercially - distributed burners designed for this application. Pressurized pure CCX is admitted to the greenhouse atmosphere at a controlled rate through pressure regulators and gas flow meters. The hydrocarbon fuels are burned at a controlled rate depending on the volume of the greenhouse. Burners and CCX flow rates are designed to maintain an atmosphere containing approximately 1000 parts per million (p.p.m.) C02 during the daylight hours (14).
Source: • Massachusetts Flower Growers Association Bulletin #93