JOHN L Hayes worries about what the future holds for his grandchildren.
He said the increasing cycles of dramatic weather changes - witnessed here and around the globe - was evidence of what scientists had been predicting for "a long time". Many people - himself included - were feeling anxious about what they were leaving behind for future generations.
"You've seen fire, you've seen floods, you've seen drought," he said.
"And it is a widely held opinion that those things combined are somehow related to climate change.
"I know there are some disputes about what is actually causing climate change, but 98 per cent of scientists around the world are saying it is human-induced. Barnaby [Joyce] and a few people don't agree with that, but they are in the minority.
"If you look at the science, the science is clear."
The Mayfield resident hopes others who have concerns and anxiety about the changing climate would consider attending a "climate grief workshop" in Newcastle on February 22.
The event, hosted by the Hunter chapter of Beyond Zero Emissions, is set to be facilitated by psychologist Carol Ride, psychiatrist Dr Charles Le Feuvre, and local GP, Dr Jennie Broughton.
"One of the things that's driving me is that I have nine grandchildren under nine," Mr Hayes said. "They don't have a voice, and unless something happens soon, they are not going to have a future. I think what we are seeing now is the evidence of what we have been talking about for a long time. We are seeing increasing cycles of dramatic weather changes."
Mr Hayes said there were a "huge number" of solutions available which would enable industry to reduce energy costs and switch to renewable energy.
"That is happening at the household level. A huge number of people have panels on their roofs, but industry hasn't been as quick to take it up," he said. "Nothing new has to be invented. All the technologies are there.
"The thing that is standing in the way are the politicians who are waving around pieces of coal."
The workshop will be held from 1pm until 4pm at San Clemente High School hall in Mayfield on February 22.
Visit eventbrite.com.au/e/84809528583 for more.