I wonder why there's a hole in the sky and other questions about the environment / Sean Callery

The perfect introduction to the environment, featuring melting ice caps, the ozone hole, solar power and much more. Clear, lively text answers all those tricky questions about how the world works, while friendly, funny cartoons add interest.--Cover.

Why is there life on earth? -- How can a star keep us warm -- What is the weather? -- Which blanket keeps Earth warm? -- How is the atmosphere like a greenhouse? -- What are the green house gases? -- Why are trees like the "bee's knees"? -- How does water cycle? -- Why can't we chop until we drop? -- What makes gas? -- Why is farming such a gas? -- What's that smell? -- Is it me, or is it hot here? -- Is this a wind-up? -- Has our climate always changed? -- Are we up to our necks in floods? -- What's wrong with parking lots? -- Who turned off the rain? -- Why are the poles hot stuff? -- Why is ice so cool? -- When is a river not a river? -- Why is there a hole in the sky? -- Is the hole in the sky always there? -- How can water be bad for you? -- When is oil like glue? -- What air makes you choke? -- Why are some animals on the move? -- Who needs a place to call home? -- Who is a tiger's worst enemy? -- What energy never runs out? -- How can the sun light up our nights? -- How is wind farmed? -- Why say bye to flying? -- What are food miles? -- Why all the fuss about taking a bus? -- Why is garbage such a waste? -- What are the three Rs? -- When is a worm my friend? -- How can I have a greener house? -- When is "off" not "off"? -- Why are some light bulbs greedy? -- How else can I save energy?

Junior