Introduction

A group of school kids in New Zealand have taken conservation to a whole new level, becoming expert rat catchers. The Junior Rat Catcher program is all part of New Zealand's impressive goal to become predator free by 2050. Protests spread in China where people are angry with the government and its strict rules forcing people to stay indoors. And now protesters have worked out a clever way to get their message across - holding up mathematical equations on a piece of paper.

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