"I love the word environmentally sustainable,"David said.
"Not long before he died, he put his hand on my shoulder and said, 'You just keep doing what you're doing. You're doing a great job', which meant a lot,"David said.
"There's plenty of people trying to do it, but they're 30, 50, 60 years behind."
"I've never really actually seen much to do with the farm back then,"she said.
"The grandchildren will be told the story of what Coco did, and I'm sure they'll get as much enjoyment out of it is we do."