"It is time to close the funding gap for Black female-led start-ups the world over," says entrepreneur Temie Giwa-Tubosun, whose company LifeBank delivers life-saving medical supplies to remote areas in Africa. Today, LifeBank operates successfully across the continent, but Giwa-Tubosun knows that barriers to funding prevent many other brilliant business ideas from blossoming. She highlights examples of impactful women-led ventures around the world -- and challenges investors to help more of them thrive.