l Co2 increased since 1700, the amount of Co2 produced by burning fossil fuels should resulted in a greater increase than observed. -Ecologist AA claims that woodlands of NH have been acting as a carbon sink, absorbing carbon and turn into wood. -A uses measurements of factors affecting the area and density of a forest accounts for missing carbon. l Determine whether the woodlands are releasing or absorbing carbon, compare wood add to wood lost. -A analysis of the past hundred years shows the woodlands change from carbon source to a carbon sink. -before 1890, woodlands were source of CO2 because of forest fires. -such deforestation releases Co2 , debris ros more quickly when the trees cleared -After 1920, the steep increase in tree growth rates surpassed the losses stemming from fire and logging, strong Co2 from fossil fuel over the next 50y
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