Some manufacturers replant what they take from the forests and use responsible methods that ensure that they are not doing harm to the eco system. For example, they won't clear an entire area of trees, they will just spot pick.

Solid wood flooring will give you a look and feel that few products can match. They also will tend to increase the value of your home. Like mentioned in a previous response many manufacturers are being responsible in how they are harvesting the wood that is made into flooring.