Choosing what to watch night after night the flicking through the endless

searching is a nightmare we want to help you on our brand new podcast off the

telly we share what we've been watching

Cladie Aide.

Load to games, loads of fun, loads of screaming.

Lovely. Off the telly with me Joanna Paige.

And me, Natalie Cassidy, so your evenings can be a little less

searching and a lot more auction listen on BBC sounds. This is the Witness History Podcast from the BBC World Service with me Louis Adaggo.

In the run-up to the UN Climate Change Conference COP26, we're looking back at how the world woke

up to global warming.

We start in the late 1950s, when a young American scientist began one of the most important projects in

establishing the existence of climate change. The scientist's name was Charles Keeling

and in January 1958 he started recording levels of carbon dioxide in the atmosphere on the

slopes of the world's largest volcano in Hawaii.

In 2012, I spoke to his widow and his son about what he uncovered.

He was a little bit like the Dutch boy with the finger in the dyke

needing to take care of something that other people weren't necessarily noticing

as being as important.

Charles Keeling's son, Ralph, says what his father had noticed was that no one was accurately

measuring the levels of carbon dioxide in the atmosphere to see if they were changing over time.

Jarskeeling decided that if no one else was successfully doing it, he would, as he himself

later explained.

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