[ Chang Ge considers the question. Optimism can be pretty valuable even when confronting a hopeless situation, so she doesn't dismiss Chiaki's question at all. ]

From what I've seen so far, I believe the cause somehow lies with us...

[ So there should be something they can do?

She pauses. Magic and dreams........... ]

I don't know about dreams, but perhaps magic could help? Do you know anyone who specializes in flora?