How did Michelle Obama make contributions to the world?

She is the first African-American First Lady, and a role model for many young women all over the world. She is admired for being stylish and confident and has given many motivational talks. Mrs. Obama is also known for her involvement with causes she believes in: she has advocated on behalf of military families, as well as promoting exercise as a way to fight against childhood obesity in American kids; she has also encouraged families to get involved with gardening so they can grow healthy fruits and vegetables. She is an advocate for girls getting a good education, and is very concerned about the environment.