特別主題：Trees
Ecology In and Around a Dead Tree
https://www.thoughtco.com/tree-snag-ecology-1342606
What Causes a Tree to Die?
https://www.thoughtco.com/what-causes-trees-to-die-conditions-that-kill-trees-1342913
10 Bad Things We Do to Our Trees
https://www.thoughtco.com/bad-things-we-do-to-our-trees-1342695
How to Identify a Tree by Its Leaves, Flowers, or Bark
https://www.thoughtco.com/these-tree-parts-identify-1343508
The Difference Between a Simple and Compound Tree Leaf
https://www.thoughtco.com/simple-and-compound-tree-leaf-4051112
How to Maintain a Tree Through the Next Decade
https://www.thoughtco.com/maintain-a-tree-through-the-next-decade-1342667
3 Types of Wounds That Trees Suffer
https://www.thoughtco.com/prescriptions-for-wounded-trees-branch-1342706
Ecosia - The search engine that plants trees