Step 1: Understanding the Question:
The question asks to identify Geoff Green and explain the opportunity he provided to students, based on the chapter "Journey to the End of the Earth".
Step 2: Detailed Explanation:
Geoff Green was a Canadian educator and adventurer who started the "Students on Ice" program. He believed that the younger generation were the future policy-makers and that a direct, immersive educational experience was the best way to teach them. He offered students the unique opportunity to visit Antarctica, the world's coldest, driest, and windiest continent. His goal was to help them understand Earth's past, present, and future, and to inspire them to become active protectors of the environment.