You're listening to a podcast from the BBC World Service. This is Hard Talk with me, Stephen Sacker.

Thanks for downloading this edition of the program. I do hope you enjoy it.

Welcome to Hard Talk on the BBC World Service with me, Stephen Sacker.

Science tells us some alarming truths about the state of our planet.

Emissions of greenhouse gases are still rising and may not peak for another decade.

Concentrations of CO2 in the atmosphere are also rising,

and the link to rising global temperatures is beyond doubt,

according to the overwhelming scientific consensus.

What science cannot tell us is how to respond.

That involves individual and collective political will.

It involves difficult choices and trade-offs.

And a vision of the future based not on our needs, but those of generations not yet born.

In terms of geopolitics, the guiding principle is the 2015 Paris Agreement,

which committed the nations of the world to take measures to keep global temperature rises

well below 2 degrees centigrade above pre-industrial levels.

Well, my guest today is Roger Hallam, co-founder of

extinction rebellion, a movement dedicated to the notion that mass resistance and civil disobedience

is the only way. But just how far are these climate rebels prepared to go? Well, Roger Hallam

joins me now. Welcome to Hard Talk. Why the need

now for extinction rebellion? Well, I think the reasons really straightforward is millions of

people around the world have realized that we've come to the point where something drastic has to happen.

And nothing is happening.

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