environmental temperature will, in general, be extremely high compared to the energy that will be contributed by the receiving antenna. TABLE 26 REPRESENTATIVE ELEMENTS OF THE RADIATION ENVIRONMENT DETERMINING ENVIRONMENTAL TEMPERATURE It may be argued that, while the heat contributed by the antenna will have little adverse effect in environments where air temperatures are moderate and there is an adequate supply of soil moisture, additions of energy to environments where organisms already experience significant heat stress and conditions are already marginal may cause noticeable damage. Thus, it may be argued that to locate the receiver in a desert may be to impose an insuperable burden on a region which is ecologically fragile under the best circumstances. The possible impact of the maximum added heat stress on the local water balance can be illustrated as follows. One mechanism by which plants reject heat is evapo-transpiration. During
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