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Training cows to use the toilet and a bouncy castle that fights climate change are some of the surprising solutions today.

Humans have been training animals like dogs and horses for centuries. But how easy is it to train a cow? Well scientists in New Zealand and Germany have been successfully training cows to use a special latrine. The cows get a reward each time they pay a visit.

The idea behind it is that by collecting their urine in the latrine, it won't release so much ammonia into rivers and streams.

In this programme we are going to look at some unusual solutions to big problems, and solutions to unusual problems you might not know existed.

We鈥檒l also hear about a bouncy castle which fights climate change by absorbing CO2, and a project to help people with different size feet find shoes that actually fit.

Presenter: Celestina Olulode
Reporter and producer: Richard Kenny
Image: Dr Matthews (Credit: Dr Caroline Bagshaw)