Hello and welcome to the intelligence on Economist Radio. I'm your host, Jason Palmer.

Every weekday, we provide a fresh perspective on the events shaping your world.

An army might march on its stomach, but its tanks still roll on fossil fuels. We examine the

largely overlooked or unreported climate contributions of the world's armed forces and what's

being done to slim them down. And the world of popular music has been shaped in part by what you

might call serendipity, or you could just call it accident.

We listen through the history of innovators who created new sounds, whole new genres of music unintentionally.

But first... Protests in Colombia continued overnight after more than a week of clashes.

Rioters have looted shops, burned buses and police stations, and blocked major roads,

leading to shortages of medicines and groceries in Cali,

Colombia's third largest city.

The government has responded violently,

deploying the army against them.

Dozens of people are dead or missing.

Hundreds more have been injured.

President Ivan Duque has said he will listen to the protesters' concerns,

but their fury with him seems only to be growing.

And Gustavo Petro, a hard-left senator whose leading polls to be Mr. Duque's successor

in next year's election is encouraging people to demonstrate.

Thousands have come up to the streets in opposition to a tax reform bill that the government

sent to Congress in mid-April. That's what triggered the protest.

Mariana Palau writes about Colombia for the economist.

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