危险树木砍伐 – 塞拉内华达公路旁巨大的空心针叶树树桩和原木. 加利福尼亚州塞拉内华达山脉的一条山路上，一棵被专业砍伐的、因火烧空心的巨大针叶树。前景中新砍伐的树桩显示出复杂的年轮和过去野火留下的深层焦痕，而它身后的巨大倒木则具有一个戏剧性的洞穴状空腔，足够让人走进去。

垂直视图，巨大的火烧空洞危险树桩 – Sierra Nevada

hazard tree damage illustration storm hurricane roots wind danger structure

国家森林中标记的危险枯树

带有核危害符号和装饰树的圣诞礼物，背景为深色

标志警告一种断枝危险的徒步旅行者沿树的，由于火灾损失，有些树也许落在其中任一

蓝色容器上的死亡鱼类和树木的危险标志

poplar fluff pollen seeds of female tree lies on meadow cottonwoods aspens and balsam poplars allergy health hazard in spring

poplar fluff pollen seeds of female tree lies on meadow cottonwoods aspens and balsam poplars allergy health hazard in spring

poplar fluff pollen seeds of female tree lies on meadow cottonwoods aspens and balsam poplars allergy health hazard in spring

poplar fluff pollen seeds of female tree lies on meadow cottonwoods aspens and balsam poplars allergy and health hazard in spring

poplar fluff pollen seeds of female tree lies on meadow cottonwoods aspens and balsam poplars allergy health hazard in spring

一个带有橙色背景和黑色树形符号的三角形警告标志，表示环境危害或谨慎在

陡峭山坡上的大规模土石流，伴有连根拔起的树木，体现环境危害与自然破坏的概念。

tree trunk wrapped with red white caution tape indicating warning and hazard in green grass nature outdoor setting expressing tree

圣诞树在前景闪耀着灯光，背景中可见火灾隐患，强调安全预防措施

fallen tree branch causes electrical arcing on power lines with bright sparks and lightning flashes danger hazard from broken

职业：树桩前方的危险标志特写。2

职业 : 树桩磨床和树桩1前危险标志的特写

科罗拉多州大针叶树附近火灾危险警示标志

在炎热的气候下，由于烧毁的树木徒步旅行和户外烤制，大自然中郁郁葱葱的木材增加了火灾危险

在瑞士瓦莱州策马特，树干上的牛过河三角警示牌

在热带沿海花园爬棕榈树砍死枝的园丁

现代汽车仪表板危险报警灯开关

沥青路面因树根损坏

火灾隐患：节日装饰的客厅里燃烧的圣诞树

桦树前的桦树

现代汽车仪表板危险报警灯开关

高尔夫球场水危险水坝鸟瞰图

高尔夫球场的航拍图，有两座水障碍大坝、沙坑和球道

一棵被白蚁侵蚀的树倒塌

a tree in a public park with a termite infestation causing a safety hazard a termite infested tree falling over

a termite infested tree falling over in public park with infestation causing safety hazard

a major tree limb breaks during storm cutting power and cable tv to neighborhood large has fallen across lines blocking the

大规模橡树修剪工作

一根掉落的树枝压在电力线和有线电视线上，导致电力供应和互联网服务中断

被放弃的圣诞树

公园内一棵树因橡树卷须蛾危害而被围封

tree roots damaging brick sidewalk in urban street environment pushing and pavement creating uneven ground potential pedestrian

natural tree pollen swirls on pond water surface during spring allergy season near stone shore thick yellow dust layer represents