Just got around to reading the Scientific american magazine I picked up about a month ago (June 2014, pg 14). Trees that pollute was one of the articles. This is more relevant to city treescape but could explain some reactions (asthma, bronchitis, etc) to specific tree types.
The gist, specific varieties of trees emit higher levels of VOCs (volatile organic coumpounds). This adds to the smog created by vehicles and industry. For the trees, these VOCs repel insects or attract pollinators. Tree VOCs are released at higher rates at higher temperatures.
High VOC emitters - black gum, poplar, oak and willow; low VOC - birch, tulip and linden.
So, plant those trees to help reduce carbon dioxide, provide ground stabilization but if you have sensitivities pay attention to the types of trees you put in your yard!
The gist, specific varieties of trees emit higher levels of VOCs (volatile organic coumpounds). This adds to the smog created by vehicles and industry. For the trees, these VOCs repel insects or attract pollinators. Tree VOCs are released at higher rates at higher temperatures.
High VOC emitters - black gum, poplar, oak and willow; low VOC - birch, tulip and linden.
So, plant those trees to help reduce carbon dioxide, provide ground stabilization but if you have sensitivities pay attention to the types of trees you put in your yard!
