Watch the full Local Focus interview for Mark Arnott's views on the city's biggest issues, and our less important quickfire questions.
Mark Arnott says Palmerston North residents could help mitigate climate change by switching off appliances and ensuring they turn off taps.
"Put LED light bulbs in your house, lots of different things. Yeah. Sky's the limit."
Arnott expressed concerned about treated waste water being discharged into the Manawatū River.
"The waste water needs looking at. I remember voting 20 years ago in a referendum about that and nothing's happened."