Destorying Terrain Trees

Hello I am currently developing a moblie FPS Survial game in which you can cut down trees, I have written most of the code to this but I can't furgue out how to remove a terrain tree. Here is the code.

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5. using System;
6.  
7. public class Tree : MonoBehaviour
8. {
9.     [HideInInspector]
10.     public static float health = 20f;
11.     public GameObject Pile;
12.     public GameObject self;
13.     public MeshRenderer mesh;
14.     public CapsuleCollider cap;
15.  
16.  
17.     public void Start()
18.     {
19.         health = 20f;
20.     }
21.  
22.     public void hit()
23.     {
24.         health -= 10f;
25.         Debug.Log(health);
26.         TextItem.WoodCount += 1;
27. //      Destroy Tree
28.         if (health <= 0)
29.         {
30.             Debug.Log("Tree Has No Health");
31.             Destroy(gameObject);
32.         }
33.     }
34. }
35.  
36.  

Thanks in advance
Ethan