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What's the best way to offset my air-travel miles?

• Source: Sierra. Mar/Apr2016, Vol. 101 Issue 2, p14-15. 2p.

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How Close Are We to Getting Electric Airplanes?

• Authors : Smith, Heather

Subjects: SCIENCE journalism; HYBRID electric airplanes; FLIGHT testing

• Source: Sierra. Jul/Aug2019, p1-4. 4p.

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Mr. Green Tells Us How Bad Plane Travel Is.

• Authors : Schildgen, Bob

• Source: Sierra. Jul2014, Vol. 99 Issue 4, p1-2. 2p.

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BEYOND OIL IN 20 YEARS.

• Authors : RAUBER, PAUL

• Source: Sierra. Jan/Feb2011, Vol. 96 Issue 1, p32-37. 6p.

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BOLD STROKES.

• Authors : Hattam, Jennifer

• Source: Sierra. Jul/Aug2005, Vol. 90 Issue 4, p16-63. 1/3p.

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Going pains.

• Authors : Castleman, Michael

• Source: Sierra. Sep/Oct93, Vol. 78 Issue 5, p26-26. 1p. 1 Color Photograph.

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