The National Arbor Day Foundation has challenged many cities to earn its "Tree City USA" flag by planting and protecting more trees.

国家植树节基金会向许多城市发起挑战，要求它们通过种植和保护更多的树木来赢得那面“美国树城”的旗帜。

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Kibara and hundreds of other farmers have been removing some of their tea bushes and planting a new kind of tea developed by the Tea Research Foundation of Kenya.

基巴拉和其他数百名农民不断移除他们的部分茶树，换成一种由肯尼亚茶叶研究基金会（Tea Research Foundation of Kenya）开发的新品种茶树。

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By July, 30 apple, pear, cherry and plum trees were planted with help from professional arborists at the Fruit Tree Planting Foundation.

FORBES: Building Self-Sufficiency, One Tree at a Time