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What's the difference between climate and weather? How do we know the climate is changing? The need-to-know answers to these and many other pressing questions are explained in this volume through incredible stories, infographics--including how many farts animals add to the atmosphere each year--and fun activities like engineering a solar oven from a pizza box. Budding brainiacs will love reading "Need- to- Know" stories, diving into interactive "Try This" activities, and building a trove of fascinating facts from a series of infographic "Data Dumps."