PLUS: Poet Gary Geddes on the anniversary of Kent State; how a Chinese restaurant in Toronto is benefitting from the Kendrick-Drake beef; how Baby Reindeer unleashed an online sleuthing nightmare; an exiled journalist explains why the Taliban's social media strategy is key to its rule; five pioneering Black ballerinas from a Harlem ballet school are reclaiming the spotlight more than 50 years later; and Riffed from the Headlines, our weekly musical news quiz.

PLUS: the Taylor Swift shadow economy; tracking hate speech in India; T Cor Bor, a star system we only get to see once every 80 years; a cattle farmer breeding more energy efficient cows; and Riffed from the Headlines, our weekly musical news quiz.

The climate is changing. So are we. On What On Earth, you’ll explore a world of solutions with host Laura Lynch and our team of journalists. In 1970, 20 million people showed up to fight for the environment on the first Earth Day. More than five decades later, is it time for this much tamer global event to return to its radical roots?

OG organizer Denis Hayes recounts how – amidst other counterculture movements at the time – his team persuaded roughly one in ten Americans to take to the streets. As he approaches 80, Denis offers his singular piece of advice to the next generation of climate leaders. Then, environmental warriors Maria Blancas and Axcelle Campana share ideas on what a reinspired Earth Day could look like – including making it a public holiday.

More episodes of What On Earth are available at: https://link.chtbl.com/PobYcvVY

We love to hear from our listeners and regularly feature them on the show. Have a question or idea? Email Earth@cbc.ca