I am interested in this field, because I wish to explore our interpretation of the language of the universe. Also, I have always wanted to teach at a post-secondary level.
A con of this career would perhaps be the demand of mathematicians in the work force being less than that of the amount of mathematicians there actually are.
This field interests me, because I believe it will be an important aspect of our future. Our planet is not in a healthy state, and we need new understandings on how to approach climate change.
A con of this field would be the lack of productivity, because there will always be some large business owner, such as an oil company, who won't want a new technology taking from their revenue.