Hyderabad: Bollywood superstar Amitabh Bachchan joined the Telangana Rashtra Samithi (TRS) Rajya Sabha MP J Santosh Kumars Green India Challenge and planted a sapling.He planted the sapling at the Ramoji Film City on the outskirts of Hyderabad in the presence of, among others, actor Akkineni Nagarjuna and producer Ashwini Dutt.Speaking