Generally speaking, laminate flooring installations are more environmentally friendly than real hardwood flooring, due to the long time it takes to replace trees. However, there are other aspects an amateur laminate flooring contractor needs to keep in mind when choosing laminate flooring.
Look for a laminate flooring installation manufactured to be low in possible toxic substances. This usually refers to the lacquer used in the finish. Cheaper brands can unfortunately be high in formaldehyde, which may be unacceptable to you. There have been reports of consumers complaining about reactions to fumes from the flooring. Ask the relevant questions while at your supplier. Do your homework to ensure that you purchase a safe product.
Cheap or discount laminate flooring installations may come with less expensive, but more potent finishes. Don't allow a sales person to side-step the issue. Demand to know what the toxicity level of the particular flooring product is. If he or she doesn't know, ask them to contact the manufacturer. Professional laminate flooring contractors know to ask for a range that has been off-gassed in the factory.