Published online by Cambridge University Press: 24 August 2009
* This date was chosen because it heralds in the Autumnal Equinox of equal division of night and day in the Northern Hemisphere and reciprocally the Spring Equinox in the Southern Hemisphere — see the strengthened statement of Biosphere Day on the reverse of this page.
** See our ‘Declaration of Biosphere Day’ (Environmental Conservation, 18[3], p. 199, Autumn 1991Google Scholar, with, on the reverse, a selection of six prior reactions) following an ‘Editorial: Rays of Hope for Planet Earth and Even Its Biosphere’ (ibid., pp. 193–6) and earlier ‘Draft Announcement of Biosphere Day’ (idem, 18[2], p. 118, 1991).