Statement: Should cutting of trees be banned altogether? Arguments: Yes. It is very much necessary to do so to restore ecological balance. No. A total ban would harm timber based industries.

Clearly, trees play a vital role in maintaining ecological balance and so must be preserved. So, argument I holds. Also, trees form the basic source of timber and a complete ban on cutting of trees would harm timber based industries. So, only a controlled cutting of trees should be allowed and the loss replenished by planting more trees. So, argument II is also valid.