Warming world gets older, wiser, richer activists hot under the collar

A growing number of older protesters are standing up and fighting for the environment

When Audrey Cooke first spoke to her family about her retirement plans, they had one condition: "Don't get arrested."

The 72-year-old retired Melbourne schoolteacher's husband died of pancreatic cancer nine years ago. She has two young grandchildren. And she is now a full-time climate activist.