Trees in cities "live fast but die young" compared to forests in the countryside, warns a new study.

一项新的研究警告说，与乡村的森林相比，城市的树木“活得快，死得早”。

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With no young trees to replace them, it is only a matter of time before most of the big trees disappear.

由于没有幼树来代替它们，大多数大树消失只是时间问题。

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In front of the two trees which have been destroyed in the typhoon sit a group of young kids.

被台风摧毁的两棵树前面，坐着一群小孩。

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Armed with buckets and shovels, Ma and other volunteers have been painstakingly watering their young trees once a month.

CNN: Fighting the desert one tree at a time

Chalara ash dieback was found in July in five young trees out of a batch of 100 supplied to Plants Ltd in Woodcock Lane, Chobham.

BBC: Chalara ash dieback found at Chobham nursery

Chalara dieback of ash, caused by the fungus chalara fraxinea, was identified at the new Welsh sites during a "trace forward" inspection of young trees sourced from known infected nurseries.

BBC: Ash dieback: First three Wales cases of 2013 in woods