Looking to the future, the main focus of development for the next generation of energy sources will be "renewable energies." These include the abundant forces of nature such as sunlight, wind, water and geothermal energy, along with "biomass energy" (e.g. methane produced by anaerobic digestion of pig-farm effluent or slurries).
放眼未來，所謂的「再生能源」──大自然中原本具足的陽光、風力、水力、地熱，或是「生質能」（如養豬廢水、污泥厭氧消化所發出的沼氣）等，將是下一代能源的開發重點。