We the future

"Ever since he learned about climate change, twelve-year-old Jonah has dreaded a weather-beaten future where not even his asthma medication can save him. Luckily, a girl from that future arrives just in time to throw Jonah a lifeline. Sunny traveled back to the 2020s with a mission: help Jonah launch a climate strike big enough to rewrite history. To do it, he'll have to recruit his entire school before Halloween. . . . How can Jonah win over 600 classmates when the only thing he dreads more than the end of the world is talking to other kids?"--Provided by publisher.