"We've done a lot of damage to our environment over the last 100 years and it needs to be fixed," he said. "It's going to be very challenging, but it's important that it's done. We will only make this happen if we work together as a region and everyone does their bit."
There were "huge" issues facing the region, from hill country and coastal erosion and global warming to polluted streams and rivers.
A representative of the Hastings ward, Mr Graham said one of the challenges facing it was water security for growers in the Twyford, and Gimblett Gravels districts.
Although this had been behind his decision to stand for council in 2013, Mr Graham said this had not been resolved.
"We've taken a huge step forward with global consents but we still haven't secured water security for our growers ... if we got a really big drought, we'd still be challenged," he said.
Mr Graham said enterprising farmers and horticulturists needed to be supported to create wealth and jobs, but this had to be done in harmony with the environment.
"There is absolutely no point in us having more wealth if we can't drink the water or swim in our rivers, lakes and sea," Mr Graham said.