The goal of each EarthEcho Expedition is to inspire and empower youth around the world with the knowledge and tools to take an active role in protecting critical natural resources in their own communities.

Growing up with my father's legacy, we never felt that we had to do anything, but we were always raised to think: What could be better than to explore the wonders of the world and share that with people? To try and make the world a better place. And I guess it stuck.

Sumatra has these lush forests and huge, amazing creatures like elephants, orangutans, and tigers. They're disappearing because of industry coming in and cutting down the forests.

We've built, drilled, and shipped indiscriminately across our oceans, with little consideration for the natural environment that is critical to the health of many of our other ocean uses, like food and recreation.

Politicians need a better understanding of global ecology. We need to be freed from our species-specific arrogance. No evidence exists that we are 'chosen', the unique species for which all the others were made. Nor are we the most important one because we are so numerous, powerful and dangerous.

The human and environmental devastation caused by nuclear weapons - whether by testing, mistake or malice - is the very reason we need to eliminate them altogether.

I think we're taking a snapshot view of climate change and trying to implement policy based on that snapshot.

Climate change is real and we have to address it.