These animals require lots of room, specific heat requirements and sunshine. These can be difficult to provide in Canada in the winter!
It is also difficult to provide a proper diet for iguanas. They require a large variety of leafy greens, some vegetables and fruit, and they require it often. This can become expensive and it is very time consuming.
Green iguanas also are frequent carriers of Salmonella, a potentially dangerous bacteria.
Keeping these reptiles as pets can be a rewarding experience, but look before you leap!