Big Ben climber said 'attention is a currency' before scaling tower

The speaker discusses their involvement in addressing the current environmental crisis, emphasizing that personal lifestyle changes are insufficient. They advocate for systematic legislative changes to address the crisis effectively. The speaker plans to engage in activism by placing an Extinction Rebellion banner on Big Ben to draw public and governmental attention to the urgent issue of the sixth mass extinction event caused by human activities.

What action does the speaker plan to take to raise awareness?

What is the significance of the 6th mass extinction event mentioned?