· Energy flow and flow of matter are essential for the existance of biosphere. Unlike the energy flow, flow of matter is cyclic.
· A large amount of energy is lost at each trophic level.
· In nature Carbon, Phosphorus, Nitrogen, Hydrogen and Oxygen are following cyclic path way.
· The energy flow through the different trophic levels, their biomass and numbers can be diagramatically represented in the forms of pyramids.
· Along with the judicious and sensible utilization of natural resources, efforts must be made to find and develop new energy resources.