Carnivorous plant because light will be more limiting than nutrients. A plant can grow at zero investment in carnivory; this is also the "optimum" investment for a plant, as any investment in traps reduces net photosynthesis (growth) to less than the net photosynthesis of a plant that obtains its nutrients from soil alone. Carnivorous plants exist between these two extremes: the less limiting light and water are, and the more limiting soil nutrients are, the higher the optimum investment in carnivory, and hence the more obvious the adaptations will be to the casual observer. The most obvious evidence for this model is
The Limits to Growth over "The Limits to Growth" concluded in 1978 that optimistic attitudes had won out, causing a general loss of momentum in the environmental movement. While summarizing a large number of opposing arguments, the article concluded that "scientific arguments for and against each position ... have, it would seem, played only a small part in the general acceptance of alternative perspectives." In 1989, a symposium was held in Hanover, Lower Saxony, entitled "Beyond the Limits to Growth: Global Industrial Society, Vision or Nightmare?" In 1993, "Beyond the Limits" was published as a 20-year update on the original material. "Limits to Growth: