This week on Sierra Club Radio:
- Naomi Oreskes, author of the book Merchants of Doubt, talks with us about the film based on her book, which exposes the disturbing right-wing campaign to sow seeds of doubt around climate science.
- Dan Chu from the Sierra Club's Our Wild America campaign shares good news about President Obama's designation of new national monuments.
If you don't see an audio player above, you can listen here.