Make down arrow on about page not clickable

src/app/components/about/about.component.html

@@ -4,7 +4,7 @@
     <h1>Greenvironment</h1>
     <br> <br> <br> <br> <br>
     <h1 class="mat-display-3">Keep it clean and green!</h1>
-    <button mat-icon-button>
+    <button mat-icon-button disabled>
       <mat-icon class="big-icon" color="primary">keyboard_arrow_down</mat-icon>
     </button>
   </div>
@@ -71,4 +71,4 @@
     <br>
     <a mat-stroked-button color="primary" class="link-button" routerLink="/login">Login</a>
   </div>
-</div>
+</div>