Chronic sinusitis may be caused by allergies, abnormal sinus anatomy that leads to chronic blockage (polyps), or dental problems. Nasal Polyps Nasal polyps are an overgrowth of tissue within the sinuses that can block the flow of mucus and air.
For outdoor plants, you can cool the air with micro-sprayers that lower the temperature by an average of 20 to 30 degrees during the day. The spray emitted is full of droplets that are 5 microns or less in diameter. The droplets evaporate, providing a cooling sensation in the surround air.
USDA Plant Hardiness Zone Map. The 2012 USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. The map is based on the average annual minimum winter temperature, divided into 10-degree F zones.he 2012 USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location.