The Sun: It's the most obvious form of energy on earth and the main source of light for our benefit consists of a group of gases through chemical reactions are kept at a constant combustion dating back 5000 million years ago in activity, provides heat energy essential to maintaining proper temperature of our ecosystems and also is transformed into electrical energy through solar panels and other electronic devices, provides light for the activities of humans and animals, provides sources of vitamins for a diversity of life through chemical reactions in the body, but also provides energy as yet unknown (as yet) usable by plants for the development, growth and survival of this.

Plants: They are the main source of oxygen for the survival of animals and humans, provide a source of energy in the form of food, ecosystems provide for the development of other life forms like other plants, animals and microorganisms. Its main process, photosynthesis, is a chemical reaction caused by a number of chemical compounds that are part of the nature of the plants where sunlight is used as light (no heat energy) and in conjunction with the chemical reactionsby the different elements present in the plant, remove the energy needed for growth development and evolution of its body.