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Why are monarch butterflies disappearing? Scientists are racing to find answers. These iconic orange, black, and white butterflies flutter across much of the North American continent, and are a familiar summer sight in many backyards. But in the last twenty years, the monarch butterfly population has been decreasing. Why? Skilled science writer Rebecca E. Hirsch takes readers on a quest to discover what scientists already know-and what they’re hoping to learn. In addition, she offers tips about what monarch lovers can do to make a difference, from planting a butterfly garden to getting the word out about harmful pesticides to taking part in citizen science projects.
€8.78
语言 英语 ● 格式 EPUB ● ISBN 9781541523227 ● 出版者 Lerner Publishing Group ● 发布时间 2018 ● 下载 3 时 ● 货币 EUR ● ID 5586303 ● 复制保护 Adobe DRM
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