THE greatest threat to our planet is the belief that someone else will say it, the animal advocate said.

"I was just four years old when I locked eyes with a sow on a truck," Ms Purcell said.

"Curious and newly obsessed with pigs after watching Babe, I asked my parents where she was going. They did not lie, and from that moment I declared, 'I don’t want to do that anymore'."

Growing up in Inv...