- If something is required to create something else then that something is needed to make that something else
- Creating paper requires cutting down trees
- Hence, cut trees are needed to make paper

- Cut trees are needed to make paper
- Trees are a kind of natural resource
- Therefore, cut trees are a kind of resource that is needed to make paper

- Cut trees are a kind of resource that is needed to make paper
- Recycling reduces the resources needed to make something
- Therefore, recycling paper reduces the cutting of trees

Therefore, recycling paper reduces the cutting of trees
Recycling of a resource, such as paper, is important because
- Recycling reduces the resources needed to make something 
- If something is required to create something else then that something is needed to make that something else 
- Trees are a kind of natural resource 
- Creating paper requires cutting down trees