Chou Yu points out that trees can gather fog. Now that many of Yunnan's forests have been cut down for new tea plantations, there it less fog, and tea leaves, which love moisture, tend to become too fibrous. The lack of intermingled camphor trees, which gave the tea that beloved camphor smell, is an even greater loss.
周渝也指出，樹能聚霧，而現在雲南大伐山林，改為專業茶園後，嵐霧不再終年瀰漫，喜含水份的茶葉有易於纖維化的傾向；同時，少了雜種的樟樹，老茶迷最愛、普洱茶中暗暗浮動的「樟香」，更是自此消失。