By then we were using trees, many tilted at curious angles, to lever ourselves like firemen down an increasingly sheer slope. If we assume (conservatively) 500 such beech trees grow on one acre, this offers space for 1250 trees on a 2.5 acre site. In a natural forest trees grow at an even pace despite differences in topography and orientation. The challenge is to extend our compassion even further to embrace all of Nature, rather than withdrawing it from animals. In order to survive as a species, human beings must reserve land for farming at least until our understanding of food sources in Nature greatly increases.