An Auckland scientist has given up plane travel for a year as part of action he is taking to combat climate change.
Auckland University physics professor Shaun Hendy said he assessed how he could reduce his personal carbon footprint, and found the biggest thing he - and many scientists could do - was to cut back on air travel.
He told RNZ's Easter Monday programme some people would not trust what was being said about climate change if those involved were not taking steps themselves.
"Something like this might just sway people that are sitting in the middle," Professor Hendy said.
"We are going to move towards a low-carbon economy and a lot of us are going to start have to start making lifestyle decision based on our carbon footprint."
He said he hoped this might sway some people who were still unsure about the credibility of climate science.
"If enough of us do it, if enough of us start making these steps then collectively we can have a global impact."
He said by not taking flights he would miss out on an invitation to speak to the UK government, but he managed to find a colleague in the US to go in his stead.
Professor Hendy is speaking in Dunedin tomorrow and is travelling down the country from Auckland by train.