How Asia's 'first lady of coal' says she's working on a sustainable future 

In this episode, CNBC's Christine Tan talks to Somruedee Chaimongkol, CEO of Banpu Public Company, to find out how the Thai coal mining firm says it is transforming its business to become more sustainable. Chaimongkol discusses how she hopes ramping up its diversification plans will ensure a greener energy future. cnb.cx/3wYmoxJ