Typically when you rescue an iguana, you are taking it out of a bad situation.
Adoption is a little different.
Not all adoptions are from a bad home, and not all of them are unhealthy. There are certain situations when some people simply can no longer properly care for their iguanas. A set-up such as this is usually when an adoption takes place. By rescuing or adopting, you could save the life of a needy, unhealthy iguana and give it a chance at a longer, happier life. It's very fulfilling to bring an unhealthy iguana back from the brink, to see it begin to thrive and to gain its trust.