In this Ideas hour we look at the pressure on our rivers. The big issue is water quality - the impact of urban wastewater and agricultural runoff on waterways.
To embed this content on your own webpage, cut and paste the following:
<iframe src="https://www.rnz.co.nz/audio/remote-player?id=2579139" width="100%" frameborder="0" height="62px"></iframe>
for easy access to all your favourite programmes