Rajan Wilcox
Fossil fuels are a class of hydrocarbon-containing materials of biological origin occurring within Earth's crust. They are used as a source of energy and include coal, petroleum, natural gas, oil shales, bitumens, tar sands, and heavy oils. The construction industry is a major user of the world's non-renewable resources, including fossil fuels. Fossil fuels are used in the construction industry in two principal ways: through the consumption of energy in the production of buildings and other constructed facilities, and through the consumption of energy in the subsequent use of these buildings and facilities. The energy in the production of buildings is used directly by the construction industry, while the energy consumed subsequently is controlled by the eventual user. The construction industry's use of fossil fuels contributes to the global production of greenhouse gases and the depletion of non-renewable resources.
| Characteristics | Values |
|---|---|
| Fossil fuels used in construction | Coal, petroleum, natural gas, oil shales, bitumens, tar sands, heavy oils |
| Fossil fuels used as construction materials | Asphalt and road oils, lubricants, petroleum coke, naphthas, distillate and residual fuel oils, polishes, waxes |
| Fossil fuels used as feedstock | Fertilizers, pesticides, hydrocarbon-fuelled irrigation, plastics, aromatics, synthetic resins |
| Fossil fuels used to generate electricity | Steam turbine generators, gas turbines |
| Environmental impact of fossil fuels | Greenhouse gas emissions, global warming, ocean acidification, air pollution, health risks |
| Alternatives to fossil fuels in construction | Timber, local raw materials, low-energy processing |
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What You'll Learn
- Fossil fuels are burned to generate electricity for construction
- Fossil fuels are used as feedstock for plastics in construction
- Fossil fuels are used as a direct source of heat in construction
- Fossil fuels are used in the creation of construction materials and products
- Fossil fuels are used as a chemical feedstock in construction
Fossil fuels are burned to generate electricity for construction
Fossil fuels are a major source of energy for the construction industry, which relies heavily on non-renewable resources. The burning of fossil fuels to generate electricity is a significant contributor to the depletion of these finite resources.
Fossil fuels, such as coal, petroleum, and natural gas, are used to produce electricity through steam turbine generators. This electricity is then utilised in the construction industry for various purposes. Firstly, it is consumed during the production of buildings and other constructed facilities. This includes the energy-intensive processes involved in manufacturing building materials, such as steel, cement, lime, glass, and brick production, which often utilise kiln processes that are fossil-fuel intensive.
Additionally, fossil fuels are burned to generate electricity for powering the machinery and equipment used in construction. This includes vehicles, heavy machinery, and other industrial processes that require electricity. The construction industry's reliance on fossil fuels for electricity contributes to the environmental costs associated with their depletion and the production of greenhouse gases.
Moreover, the design of buildings plays a significant role in their subsequent energy use. For example, a building designed for air-conditioning will likely require a significant amount of electricity to function, further increasing the demand for fossil fuels. Additionally, the use of fossil fuels in construction extends beyond combustion, with petroleum products being used in plastics, natural gas in fertilizers, and coal tars in skin treatment products.
The construction industry's consumption of fossil fuels for electricity generation has led to concerns about the environmental impact and the need for sustainable alternatives. Recognising the climate crisis and pollution caused by fossil fuels, there has been a growing movement towards renewable and cleaner sources of energy. However, the construction industry's complex supply chains and lack of transparency in material sourcing make it challenging to fully understand the impact of fossil fuel usage in this sector.
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Fossil fuels are used as feedstock for plastics in construction
Crude oil and natural gas, two primary fossil fuels, play a significant role in the creation of plastics. The process of refining these fossil fuels yields various feedstocks, such as alkanes and olefins, that serve as crucial inputs for the petrochemical industry. Olefins like propylene, ethylene, and butylenes are used directly in plastics manufacturing. Additionally, alkanes can be fed into petrochemical crackers, further emphasizing the integral connection between fossil fuels and plastic production.
The building and construction industry is the second-largest consumer of plastics, just behind packaging. Plastics have been widely used in construction for a long time and are now found in a diverse array of building products. Market trends indicate a notable increase in the use of plastics like polyvinyl chloride (PVC), polystyrene, polyethylene, and polyurethanes in building materials.
The affordability of plastic products is often attributed to the externalization of the costs associated with fossil fuels and industrial pollution. This practice disproportionately impacts BIPOC and low-income communities, who bear the brunt of toxic pollution from refineries, chemical manufacturing, and plastics plants. As a result, these communities experience higher rates of chronic diseases linked to such environmental hazards.
While the transition to fossil-free plastics is challenging, there are alternative methods for making plastic production less reliant on fossil fuels. For instance, methanol, derived from renewable biomass or green hydrogen, can serve as a feedstock for plastic production in a net-zero economy. Additionally, companies like Avantium produce plastic from sugars, showcasing innovative ways to reduce the dependence on fossil fuels in the plastic industry.
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Fossil fuels are used as a direct source of heat in construction
The combustion of fossil fuels releases stored carbon and other greenhouse gases, contributing to dramatic changes in Earth's climate. In 2020, the United States' energy-related carbon emissions were predominantly attributed to oil, followed by natural gas. Despite the environmental concerns, natural gas is projected to meet a growing share of energy demands due to its lower carbon dioxide emissions compared to coal.
In construction, fossil fuels are employed for direct heating in home furnaces. Additionally, they are used to generate electricity, either by burning coal or using steam turbines with natural gas. The use of fossil fuels in construction, along with their extensive use in industry and transportation, has significantly contributed to the increase in atmospheric CO2 concentrations, exacerbating human-induced global warming.
While fossil fuels have been a significant energy source, there is a growing recognition of the need to transition to cleaner technologies. Cities are taking steps to eliminate fossil fuels in buildings, and renewable energy sources, such as hydropower, biomass, wind, geothermal, and solar power, offer more sustainable alternatives with zero carbon emissions. However, the infrastructure delivering gas to buildings and the appliances that use it remain prevalent, underscoring the challenges in fully transitioning away from fossil fuels in construction.
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Fossil fuels are used in the creation of construction materials and products
The construction industry uses fossil fuels in the form of direct fossil-fuel burning or the use of electricity. Fossil fuels are used to create construction materials such as plastics, asphalt and road oils for roofing and paving construction, lubricants, petroleum coke, polishes and waxes, and chemical feedstocks. Even wood, a traditional material, is widely manipulated using cold-cured synthetic resin glues to increase its structural strength and moisture resistance. Polyvinyl chlorides are used in plumbing supplies, exterior sheathing, interior surfaces, furniture, and landscaping.
The use of fossil fuels in construction is a concern due to the current rate of depletion of these non-renewable resources and their contribution to the global production of greenhouse gases. The burning of fossil fuels releases carbon dioxide (CO2), which is a major factor in human-induced global warming. Methane (CH4), another greenhouse gas, is the main component of natural gas and its concentrations in the atmosphere have also been rising.
There is a lack of transparency and regulation regarding the use of fossil fuel-based materials in the construction industry. Architects, engineers, builders, and the public often have limited access to information about the origins and chemical content of these materials, making it challenging to evaluate their potential health and environmental impacts.
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Fossil fuels are used as a chemical feedstock in construction
The demand for chemical products, especially plastics, has grown faster than any other bulk material. From 1950 to 2015, resins and fibres used in plastic production grew at a compound annual growth rate (CAGR) of 8.4%, which was around 2.5 times higher than the CAGR of the global gross domestic product. Despite being the largest industrial energy consumer of both oil and gas, the chemical industry was only the third-largest industrial emitter at 920 MtCO2 in 2019 from primary chemical production alone. This is mainly due to the high shares of non-energy use of fossil fuels as feedstocks, where high shares of the fossil carbon are embedded in the chemicals produced.
The dominant feedstock for both ammonia and methanol is natural gas, although coal is also used in China. These primary chemicals form the building blocks for thousands of intermediates, eventually ending up in fertilizers, plastics, and other chemical products. Hydrocarbon gas liquids (HGL) such as ethane, ethylene, butane, and natural gasoline are important components for making plastics. HGLs are used as intermediate products, while petrochemical feedstocks are used directly at chemical plants. Other petrochemical feedstocks are used to make synthetic fabrics, such as Kevlar, synthetic rubbers, detergents, and other chemical products.
The use of chemical products will be essential to produce technologies that can eliminate emissions in the energy sector. To meet the targets of the Paris Agreement and develop a carbon-neutral and sustainable chemical industry, a complete defossilization of carbon feedstocks must occur. Net-zero transition scenarios for the global chemical industry by 2050 have been performed at a global level, but none have been performed at a high regional resolution providing techno-economic implications for the chemical industry transition.
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Frequently asked questions
Fossil fuels are used in construction both as a direct source of energy and as a component of construction materials. The construction industry is responsible for the consumption of commercial energy in two principal ways: through the consumption of energy in the production of buildings and other constructed facilities, and through the consumption of energy in the subsequent use of these buildings and facilities.
Fossil fuels such as coal, petroleum, and natural gas can be burned to provide heat and electricity during the construction process.
Fossil fuels are used in the production of plastics, asphalt, lubricants, and other materials commonly used in construction. For example, polyvinyl chlorides derived from petroleum are used in plumbing supplies, exterior sheathing, interior surfaces, furniture, and landscaping.
