If the answer is false, shade in B on your answer sheet. In the stratosphere, temperature increases as altitude increases. There are abundant exchanges between the troposphere and the nstratosphere. The effect of photosynthesis in the concentration of oxygen in the atmosphere is negligible. According to the precautionary principle, the international community should act prudently and not take any course of action before this is scientifically justified.
Most tropical timber is harvested to make pulp for paper production.
Agricultural systems have higher Net Primary Productivity and higher biodiversity than most natural ecosystems. In tropical rainforests nutrients are mainly stored in the biota.