AIR POLLUTION AND IT‘S EFFECTS ON PLANTS IN CHINA Correlation Analyses of Fluoride Content and Jujube Black Tip Disease Effects of Fluoride Stress on Chlorophyll Fluorescence in Leaves of Tea Seedlings Effects of Recreation on Plants in Zhangjiajie National Forest Park The Effects of SO2 and Fluoride on Physio-ecological Changes in Plant Leaves Effects of fluoride on growth, nutrient contents, catechins and aroma components in leaves of tea seedlings Effects of fluoride on soil properties and yield and quality of maize Study of the protection effect on plant after hydrogen fluoride fumigation Effect of Fluoride on the Activity of Antioxidases and Level of Na+-K+-ATPase in Kidney of Carp Farmland eco-environmental situation in outskirts--A case study from Ltjiazhuang Village of Jinzhou City of Hebei Province Fluoride accumulation and distribution in mulberry insects near fluoride pollution sources EFFECTS OF COMBINED FUMIGATION OF OZONE AND HYDROGEN FLUORIDE ON MORPHOLOGY AND PHYSIOLOGY OF WHEAT LEAVES