eco-friendly - making the world cleaner and healthier by using less energy and creating less waste, environmental sustainability - keeping Earth healthy by not using too much of its resources for a long time, conservation - protecting plants, animals, and nature by not wasting or hurting them, global challenges - issues that affect the whole world and need everyone to work together to solve, commitment for change - a promise to do things that help the Earth,

The big Green Lesson 1

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