When Vicki Hollub was named CEO of Occidental Petroleum in 2016, she became the first woman to lead a major oil and gas company. In the years since she's brokered some big acquisitions, brought on Warren Buffett as a major investor and produced record returns for shareholders.But the savvy Leadership Next listener wants to know: can you do all of that AND truly care about sustainability? Hollub says not only is it possible, it's essential that energy companies focus on their climate impact. In today's episode, recorded live at Deloitte University in Dallas, Texas, Hollub tells hosts Alan Murray and Ellen McGirt all about OXY's plans to build out a carbon capture business and why this makes strategic sense for the company.Also in today's episode: details on how the controversial deal to buy Andarko Petroleum came to pass, how employee expectations around the CEO role have changed, and why Hollub never thought she would become CEO.Explore more of Fortune! Use the promo code LN25 to get 25% off our annual subscription at fortune.com/subscribe.