It was striking to think about the energy it gave off and the damage it caused for people unfortunate enough to be in its path.
We had never seen so many extremely impressive tropical storms—you could practically see into the eye of the cyclone. They're walls of clouds with phenomenal power, coming more and more often and causing more and more destruction.
Does the earth seem fragile?
Yes, absolutely. Seeing the planet from the window of your space craft makes you think. You only have to see it once: you can spend two days in space and just getting that distance, seeing the fragility of the atmosphere, that thin bubble that makes life possible in the vacuum of space, that incredible oasis—it changes your life.
When you see changes over the long term—sometimes you need more than five years to see it—you can't help but feel concerned.
That's why I became an ambassador for the (UN's) Food and Agriculture Organization, and an advocate for many environmental causes.
What worries you the most?
The idea that we might not succeed in reaching an agreement at an international level, and that economic concerns dominate over environmental ones.
It's a completely short-sighted approach. Over the long-term, profits are directly threatened by climate change. When you see the Great Barrier Reef not included on the list of endangered sites because of Australian government pressure, you think the priorities are wrong and we're in trouble.
The first thing to do is listen to the experts who have dedicated their lives to providing solutions on a local, regional, national and global level. We have to try to put solutions in place.
The most urgent task at hand is to decarbonise. You have to prioritise renewables and carbon-free energy. And that takes restrictive measures and international commitments for which countries can be held accountable. That's what COP26 is all about.