एक पॅड विघटित व्हायला लागतात 800 वर्ष; या दोन महिलांनी काढला भन्नाट पर्याय; आज कोट्यवधींची उलाढाल, नेमकं काय केलं? (A sanitary pad can take up to 800 years to decompose. Two women identified the problem, created an innovative sustainable solution, and built a multi-crore enterprise. What exactly did they do?)