Greta Thunberg found a supporter in actress Priyanka Chopra who is a global UNICEF Goodwill Ambassador for child rights. She thanked her on twitter. She said, "Thank you @gretathunberg for giving the much-needed punch in the face." In an interview with NDTV's Rohit Khilnani. Priyanka Chopra explains why children are much more cautious about world issues and how she understood such things only post 30.