On September 23, UK Prime Minister Boris Johnson told world leaders that humanity must grow up. He said it is necessary to learn to deal with climate change. In his speech, PM Johnson compared the collective conscience of humans to a 16-year-old. He said that it is high time that we stopped trashing the planet. Johnson’s speech comes ahead of a major United Nations climate summit in Glasgow, Scotland. Johnson said that humanity is behaving like an impetuous 16-year-old, “just old enough to get ourselves into serious trouble.” Watch the video to know more.