Many adults have taken to social media to express their opinions on Thunberg and mostly that involves criticising her.
US President Donald Trump, who may use the "helpline", was one of the people to sarcastically tweet about the activist's speech saying that Thunberg looked like "a very happy young girl".
Greta Thunberg spoke at the United Nations Climate Action Summit in New York on Monday and told the world's leaders they had "stolen my dreams and my childhood".
Her fierce speech was broadcast around the world, resonating with millions but also rubbing up a lot of people the wrong way.
A number of commentators and politicians in Australia especially took offence to the speech, making Facebook banners calling for a "Greta Free Zone" and others labelling the teenager an "annoying little brat".
Despite the backlash, Thunberg has embraced the heat, telling her 2.3 million followers to turn their focus elsewhere.
