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.

You're listening to the Witness History Podcast from the BBC World Service with me Ashley Byrne.

Today I'm taking you back to June 1988 and the moment when the world woke up to the threat of global

warming.

Altogether, this evidence represents a very strong case, in my opinion, that the greenhouse effect

has been detected and it is changing our climate now.

On the 23rd of June 1988, the temperature was soaring in Washington, D.C.

Scientists Professor James Hanson was giving testimony to the United States Senate Committee on Energy and Natural Resources.

By the time he was finished, he had put the greenhouse effect and climate change on the worldwide agenda.

The world is heating up, and there's not much doubt it will continue to heat up until some fairly urgent action is taken by the industrialized world to slow down the emission of the gases which cause the so-called greenhouse effect.

Professor James Hansen had actually begun his career looking at climates millions of miles

from Earth.

I thought what could be more exciting than studying what the clouds of Venus are

made of. But in the late 1970s we realized the Earth's atmosphere is changing, which makes the Earth a more

interesting planet than the others. So I changed and started to try to develop a model for simulating the Earth's climate so we could figure

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