42 Engineering work; surveying (engineering work); designing and developing installations for the material and energy reclamation of waste; engineering services for the material and energy reclamation of waste; designing and developing mobile or stationary equipment, apparatus and installations for the production, recovery, separation, filtration, purification, liquefaction and distribution of biofuels, gases, fuel gas, renewable gases, biogas, biomethane, syngas, natural gas for vehicles, liquefied natural gas, liquefied biomethane; engineering services for developing mobile or stationary equipment, apparatus and installations for the production, recovery, separation, filtration, purification, liquefaction and distribution of biofuels, gases, fuel gases, renewable gases, biogas, biomethane, syngas, natural gas for vehicles, liquefied natural gas, liquefied biomethane; research in the field of renewable energies; research with respect to ecology; scientific research; scientific research with respect to energy; scientific research in the field of environmental protection; designing and developing mobile or stationary equipment, apparatus and installations for the separation, filtration, refinement and purification of liquid effluents and/or solid waste; technical research; software and computer design; developing software and computers; research and development of goods for others; research and development of products for the production, recovery, separation, filtration, refinement, purification, liquefaction and distribution of biofuels, gases, fuel gases, renewable gases, biogas, biomethane, syngas, natural gas for vehicles, liquefied natural gas, liquefied biomethane; research and development of products for the separation, filtration, refinement and purification of liquid effluents and/or solid waste; conducting of technical project studies; conducting technical project studies with respect to environmental protection and sustainable development; quality control; quality control services (operation, performance) of installations for the production, recovery, separation, filtration, refinement, purification, liquefaction and distribution of biofuels, gases, fuel gases, renewable gases, biogas, biomethane, syngas, natural gas for vehicles, liquefied natural gas, liquefied biomethane; quality control services (operation, performance) of installations for the separation, filtration, refinement and purification of liquid effluents and/or solid waste; technical assessments concerning design (engineers' services); technological research; conducting of technical project studies; software installation; software maintenance; updating of software; software rental; programming for computers; computer system analysis; computer system design; Software as a Service (SaaS); cloud computing; energy auditing.