37 Construction services, installation work, servicing and repair in relation to wind farms; construction services, installation work, servicing and repair in relation to solar farms; construction services, installation work, servicing and repair in relation to wind farms combined with land and sea solar farms for generating electricity; construction services, installation work, servicing and repair in relation to land and sea plants for generating electricity from renewable sources; construction of wind power plants; construction of solar power plants; construction of wind energy power plants combined with solar energy power plants; installation of wind power systems; installation of solar power systems; installation of wind energy systems combined with solar energy systems; maintenance and repair of wind power plants; repair and servicing in relation to and solar energy based power plants; repair and servicing, in relation to wind power plants combined with solar power plants; repair services for electric generators; repair services for wind turbines; repair in relation to solar generators; repair in relation to wind turbines combined with solar generators; construction of infrastructures for generating power from renewable sources; installation of power generating apparatus; construction and installation of renewable energy generators; construction services and installation work in relation to plants for generating, storing, and distributing hydrogen; construction, installation and maintenance of industrial chemical installations for the preparation of chemicals, enzymes and catalysts for the capture and separation of carbon dioxide; building, construction, maintenance and installation services and repair in relation to industrial plants for the capture, segregation, storage and re-use of carbon dioxide from industrial effluents; building construction, building construction supervision, repair, installation services, alter, servicing in relation to industrial plants and infrastructures for producing, treating, refining, conducting, storing, transporting and distributing fluids and liquids, in particular water, hydrocarbons, petrol, gas, natural and refined gas, liquid gas and chemicals, hydrogen and carbon dioxide; building construction, building construction supervision, repair, installation services, alter, servicing in relation to petrochemical plants, chemical plants, distribution networks for transporting fluids, liquids and fuels, especially water, hydrocarbons, petroleum, natural gas and refined gases, gas and liquid gas, namely, fuel gas, gaseous fuel mixtures, hydrogen and carbon dioxide; environmental reclamation of industrial sites; construction, repair, modification and maintenance of installations for producing, storing and transporting energy; construction, repair, modification and maintenance of installations for producing fertilisers; construction and drilling of onshore and offshore wells for exploration and production of oilfields and gas fields or for geothermics; hydrocarbon extraction; extraction of gas; extraction of oil; extraction of natural resources; pumping and extraction of oil; oil extraction services; construction and building construction supervision of floating, marine or underwater resources; construction and building construction supervision of railways, railway networks and transport infrastructure for passengers and goods; construction and building construction supervision of marine, lake and river infrastructure; construction of infrastructures, including underwater, for hydrocarbon extraction; servicing and repair in relation to facilities, including underwater, for hydrocarbon extraction; construction services, installation work and servicing in relation to plants and equipment for the extraction and processing of oil and gas; construction, maintenance and repair of installations, systems and infrastructure for the petroleum and gas industry, and for the green and renewable technologies industry, including installations, systems and infrastructure for refining, petrochemicals, and for synthesis gas and fertiliser production; construction, maintenance and repair of installations, systems and infrastructure for producing, transporting, storing and regasifying liquefied natural gas; construction, maintenance and repair of land-based, offshore and underwater installations, systems and infrastructure for producing, storing and transporting hydrocarbons; building construction, maintenance, repair in relation to installations, systems and infrastructure for generating, storing and transporting renewable energy; servicing and upgrading, in relation to ROVs (remotely operated vehicles); maintenance of underwater machines and equipment; excavation of trenches, burial, exhuming and seabed preparation being laying of sea cables and sealines; assistance in the laying of pipes, underwater construction; maintenance, repair, inspection for the purpose of maintenance and repair of offshore and underwater equipment, infrastructure and installations; dismantling of offshore and underwater platforms and structures