Bihar: Solar Charkha doubles income for Sadhna Devi Sadhna Devi of Nawada in Bihar have written to PM Modi saying that their lives have changed drastically because of the solar charkha. Watch the full video to know more. Zee News is the highly popular Hindi News channel of India’s largest television network ZMCL. The channel, which has a huge following in India and abroad, has won several prestigious national and international awards. Amongst its popular programs are - Dr.