The size of the problem -- Aviation's energy predicament: reducing the wingprint -- Aviation's energy predicament: no fuel like an old fuel -- Jet fuel: one of alternative energy's orphans -- Policy: background -- Understanding sustainability -- What do we owe the future (and how much shall we pay)? -- Closing the circle -- Measuring sustainability -- Sustainability assessment and certification: who should do it? -- Policy development -- The machinery of policy development -- Policy strategy: support -- Discussion of current attitudes and efforts -- Conclusion: there is no such thing as "business as usual."

"While international negotiations to reduce greenhouse gas (GHG) emissions have been less than satisfactory, there is a presumption that a significant level of multi-lateral commitment will be realized at some point. International air and marine travel have been left to one side in past talks because the pursuit of agreement proceeds on the basis of commitment by sovereign nations and the effects of these specific commercial activities are, by their nature, difficult to corral and assign to specific national jurisdictions. However, air travel is increasing and, unless something is done, emissions from this segment of our world economy will form a progressively larger percentage of the total, especially as emissions fall in other activities." --