In this addition to the Baby Loves Science board book series, Spiro uses a familiar reference to create a global warming analogy: "Baby has a blanket...When Baby puts the planet on, she feels warm...The earth has a blanket, too. Just like Baby! The earth's blanket is air." Chan illustrates in cheerful images, including a smiling, anthropomorphic Earth; the baby, who has blue-black hair and a serene expression, shows concern as she learns that greenhouse gases are making the Earth too hot under its blanket. A spread shows vehicles and factories puffing out cloudy emissions, leading to the question "How can people help?" Chan suggests green energy options with images of wind turbines and solar panels, and lists tips for how family members of all ages can help the Earth (turning out lights, recycling). A timely primer for early ecologists.