Wintertime Air Stagnation Wintertime Air Stagnation <div class="ExternalClass1852DCA50CF344B5BA4DE9FF88CE8321"><p>Fine particulate matter can damage health by aggravating existing lung and heart diseases, increasing the risk of cancer, and reducing life expectancy. It also affects the environment by damaging crops and vegetation, acidifying soil and surface water, and creating a haze in the air.</p><p> During a period of calm winds and air stagnation in November, several of the 28 air quality monitoring stations in the airshed measured elevated levels of fine particulate matter due to wood smoke from home heating, outdoor burning, and diesel engine emissions. Around the same time period, the Hope air quality monitoring station measured elevated fine particulate matter levels due to smoke from a nearby large open fire.</p><p> Metro Vancouver is working on several programs to help reduce particulate matter from these sources like our <a href="/services/air-quality/projects-initiatives/Pages/wood-stove-exchange.aspx" target="_blank">Wood Stove Exchange Program</a>, which provides rebates for trading in an old uncertified wood-burning appliances, and the <a href="/services/Permits-regulations-enforcement/non-road-diesel/Pages/default.aspx" target="_blank">non-road diesel engine regulation</a>.</p><p> Metro Vancouver operates an extensive network of air quality monitoring stations year round at 22 locations across our region and six in the Fraser Valley Regional District that provides up-to-date information. Anyone can check air quality in our region at <a href="" target="_blank"></a>.</p> </div>|#08524215-2a3b-4829-9825-f56a6017495c;L0|#008524215-2a3b-4829-9825-f56a6017495c|Issue 5;GTSet|#d14ffe11-45dc-48fb-8684-ff109cf15a74<div class="ExternalClass3154F7B5013F4289A6DDD76B6393ED3B"><p>Metro Vancouver generally enjoys good air quality. It occasionally deteriorates, however, even during the winter. A phenomenon called air stagnation happens during <a href="" target="_blank">temperature inversions</a><strong> </strong>when pollutants can be trapped below the inversion, allowing them to build up. Air stagnation can cause elevated levels of <a href="/services/Permits-regulations-enforcement/air-quality/factors/contaminants/Pages/default.aspx" target="_blank">fine particulate matter</a> to build up.</p> </div>