Philanthropists Bill and Melinda Gates released their annual letter on Thursday. In it, they predict what the world would look like by 2030.
Aid may often be criticised, but it works, says the Gates Foundation.
Family planning is not a luxury to everyone. Melinda Gates talks about why she has dedicated so much of her time to helping women plan their families.
Billionaire philanthropist Melinda Gates has vowed to dedicate the rest of her life to improving access to contraception across the globe.
But experts warn that drugs alone will not win it, after the pharmaceutical giants agree to work together on an ambitious project.