Impact of natural gas on the environment
Natural gas consumption is growing worldwide. This increase is driven by the continuous discovery of new gas fields, generating expectations for their exploitation in the short and medium term. However, it is important to remember that natural gas is a non-renewable resource , meaning that once used, natural sources are depleted without the possibility of regeneration in timeframes comparable to human life cycles.
At both industrial and domestic levels, natural gas has numerous applications, including its use as a vehicle fuel . Furthermore, it presents itself as a cleaner energy alternative compared to other fossil fuels such as oil or coal , as it emits less carbon dioxide (CO2) during combustion.
Environmental advantages of natural gas
One of the main advantages of natural gas over fossil fuels like coal is the reduction of polluting emissions. Natural gas emits between 50% and 60% less CO2 than coal when burned, making it a less harmful option for the atmosphere in terms of global warming.
Another positive aspect is that, while natural gas is a fossil fuel, it emits very few sulfur and mercury particles compared to other fossil fuels like coal or oil. This means that natural gas generates fewer problems related to direct air pollution .
When considering the impact of natural gas on transportation-related emissions, liquefied natural gas (LNG) or compressed natural gas (CNG), used in vehicles, represents a better alternative to traditional fuels like gasoline. The use of CNG in automobiles reduces emissions of harmful gases such as carbon monoxide and hydrocarbons , thus contributing to improved air quality in large cities.
Negative impacts of natural gas on the environment
Despite its advantages, natural gas is not without negative environmental impacts . Like oil extraction, natural gas exploration and extraction can have devastating effects, particularly when the exploration technique known as fracking or hydraulic fracturing is used.
Fracking creates fissures in underground rock formations to increase the flow of gas to the surface. This method can not only contaminate aquifers but also cause earthquakes and consume large quantities of water, which then become polluted. Therefore, although natural gas may be considered cleaner than other fossil fuels, methane leaks and the side effects of fracking are of great concern to the environment.
A key consideration in natural gas extraction activities, especially in regions like the Arctic or the Amazon, is deforestation and the disruption of fragile ecosystems . The construction of large infrastructure projects , such as pipelines, which are necessary to transport the gas, also entails a significant environmental impact related to habitat destruction and the displacement of local communities.
Human health risks
Despite efforts to keep natural gas under control during its production and use, there are inherent risks to human health . According to studies by Harvard University and other academic institutions, fossil gas is estimated to contribute significantly to premature mortality worldwide due to particulate matter.
Natural gas burns cleaner than coal or oil, but it remains a source of air pollution , with emissions of nitrogen oxides that can have adverse health effects, such as respiratory and cardiovascular problems . These emissions are particularly problematic in urban areas where natural gas use is concentrated in homes and industries.
Alternatives to natural gas
With natural gas reserves projected to be depleted in the coming decades, it is imperative to seek viable alternatives. One such alternative is biogas , a renewable fuel generated from organic materials such as manure and agricultural waste. Unlike fossil gas, biogas is constantly replenished, and its use contributes to reducing net greenhouse gas emissions.
In Spain, there are already significant initiatives related to biogas production, although they are still limited compared to other countries. Expanding this technology is vital to mitigating the environmental risks of fossil fuel depletion and contributing to the transition to a greener and more sustainable economy.
Natural gas may be cleaner than coal or oil, but it still contributes to climate change and has serious impacts on human health and the environment. It is important to consider renewable energy sources such as solar , wind , and geothermal , which, when combined, can meet energy demands without the dangers associated with fossil fuels.