However, their effects are probably accentuated by climatic factors, such as drought and hard winters, or soil imbalances such as soil acidification, which damages the roots.
然而，它们的影响可能因气候因素而加剧，如干旱和严冬，或因土壤酸化等土壤不平衡而损害到根系。
Soil acidification can be the result of acid rain.
土壤酸化可能是酸雨的结果。
But singling out the role of acidification will be hard.
