Greta Thunberg appeared to give the president an icy look at the U.N. Climate Action Summit Rachel DeSantis is a senior writer on the music team at PEOPLE. She has been working at PEOPLE since ...

But seeing 16-year-old Greta Thunberg in action made her realise something: she’s not doing enough. Thunberg first came to international attention last August, when she began striking from ...