You may need to do this if you are afraid that the tree will fall on your house or someone else's home. If you can't afford to hire a company, you can cut down the tree using your own hands. If you don't have the required tools, you may be able to find them in a home improvement store.
If it is a dead tree, then you can remove it yourself. You should know where the tree is located so that you can contact a tree service to remove it. If it is near your home or business, it may be advisable to call a tree service so that they can remove it.
When you hire a tree service, they will cut down your tree, haul it away and plant a new one. Some of the trees that need to be removed may be small and easy to move. Others may be large and weigh several tons.