1 Copper and PVC water pipes are relatively non-toxic. 2  Copper is a natural material that has been proven to be safe to health. 3  PVC pipes are also safe. 4  Lead on the other hand is extremely toxic. 5  Lead is corrosive and can leak into the drinking water system. PVC is likewise a safe material to carry drinking water. 2  Copper and PVC water pipes do not suffer easily from corrosion, while iron corrodes relatively easily. 3  Copper is relatively easy to work with because it is much softer than iron or lead.
Advanced. Stoichiometry determines the quantitative relationships between reactants and products. Stoichiometric relationships are based on the laws of conservation of mass and energy and the law of combining weights or volumes.
The goal of our research on stoichiometry is to examine the potential for nutrient and light limitation to control zooplankton herbivore composition. We are studying zooplankton herbivores, in part because their life cycles are short and amenable to experimental time scales.