I read little bits of everything. My mystery preference is cozy. I enjoy science fiction, but do not have a science background. And I'm a hobbit from wayback before I was old enough to vote.
Not as good as "Life as We Knew It" or "The Dead and the Gone", but this book involves a comet that changes the atmosphere of the Earth. The solution send 251 kids to another planet to colonize. First in what appears to be a trilogy. Plot is somewhat predictable looking at it as an adult, but a child would probably not figure it out.