Why is there life on earth? -- What is the blanket around the earth? -- Why are trees the bee's knees? -- Who gives off gas? -- Is it me or is it hot in here? -- When do banks burst? -- What's up with the poles? -- Why is there a hole in the sky? -- How can water be bad for you? -- Why are some animals on the move? -- Whose energy never runs out? -- Why say 'bye to flying? -- Why is waste a waste? -- How can I make my home green?.