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Protecting Earth's Air Quality
e-bok,
2015,
Engelsk,
ISBN 9781512410488
Every living thing on our planet needs air to survive. Most of the time, we hardly even think about Earth's air. But did you know that many of the things we use every day-from cars …
Protecting Earth's Land
e-bok,
2015,
Engelsk,
ISBN 9781512410495
Nearly all living things depend on Earth's land and its resources to survive. But did you know that people do many things that hurt the land? The damage sometimes destroys forests, …