The only thing to be said for air travel is speed. It makes possible travel on a scale unimaginable before our present age. Between the ages of 20 and four-score I visited every country in Europe, all save two in Latin America, ditto in Africa, and most of Asia, not counting eight trips to Australia and 60 to the United States - all by air.

Throughout the industrial era, economists considered manufactured capital - money, factories, etc. - the principal factor in industrial production, and perceived natural capital as a marginal contributor. The exclusion of natural capital from balance sheets was an understandable omission. There was so much of it, it didn't seem worth counting.

My dad was somewhat of a naturalist and used to teach us about different birds and trees. So did a fifth grade teacher who made a lasting impact on me; to this day, I remember his lessons about counting the needles on pine trees, seeing if they are twisted or straight, and about checking the tips of oak leaves to see if they are pointed or lobed.

If you say actors have a social responsibility to do things, you are right, in a way. It's a wishful decision. But if it's done out of force, I don't think it will accomplish anything. Everybody starts counting how much work they have done and see if they have done their due for the week. That is not social service. You need to go way beyond that.

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