Question about leopard geckos & iguanas

Question
Can I place a leopard gecko & an iguana in the same tank.

Answer
I would strongly recommend against that. Co- habitating different species from entirely different parts of the world presents a health risk to one or both. They would be exposed to each other's droppings and bacteria etc that is normal and harmless to one species may not be so to the other. In this case the two species also require two completely different environments, the leopard is semi arid to arid desert while the iguana reqires a high humidity tropical setting.