Ethics are always relative to one’s environment (that is, one’s ethos). Morality, if it exists, is an internally-derived understanding of right and wrong. It’s entirely possible for ethics and morality to be opposed to each other. For example, it’s very clear that most people consider it to be ethical to smoke marijuana. Most people do (or have done so). It’s also very clear that a large number of people consider it to be wrong to do so, making it also immoral. Likewise other popular crimes such as gambling, prostitution, and cheating on taxes. They are so commonly done that we must accept them as ethical, despite the fact that many find them immoral.