Some major companies are now burning waste in incinerators that it gets out of landfills, where it can release methane into the atmosphere.

But burning it can release carbon and other toxins into the air. So, what’s the most climate-friendly way for companies to handle bulk waste they can’t recycle?

Katie Schoolov covers Amazon for CNBC and recently looked into this. She joined Climate Cast to share her findings.

To hear the episode, click play on the audio player above or subscribe to the Climate Cast podcast.