La natural gas energy It is often valued as a less polluting alternative to other fossil fuels such as coal or oil. In fact, in many cases it is used as a natural substitute of these dirtier sources of energy. However, despite this positive perception, the reality is more complex.
Recent studies and reports have indicated that the production and use of natural gas involves a large amount of emissions of polluting gases. This fact is especially evident in the early stages of the process, such as extraction and transportation of gas. Although it is true that its combustion generates less CO2 compared to other fossil fuels, it cannot be overlooked that methane emissions throughout their cycle are significantly harmful. In fact, methane is one of the most potent greenhouse gases.
A deeper look at natural gas: What you can't see
When talking about natural gas, it is essential to understand the entire cycle of this fossil fuel. From extraction to final combustion, natural gas produces multi-phase contamination.
Natural gas is essentially a mixture of gases, being methane its primary component. While the combustion of natural gas generates 50-60% less CO2 compared to coal, the real environmental impact is not limited to this final phase. extraction and transportation The gas generates leaks and methane leaks that seriously impact the environment, this gas being 84 times more potent than CO2 in terms of heat retention over a period of 20 years.
During the extraction phase, the use of fracking (hydraulic fracturing) opens multiple sources of fissures in the rocks that release large amounts of methane into the atmosphere. This process also uses toxic chemicals which end up contaminating groundwater and affecting the health of nearby populations.
Fracking: The Dark Side of Gas Energy
Fracking has become a key pillar for the gas industry in recent years, especially in countries such as the United States. The technique consists of inject large volumes of water at high pressure to fragment underground rock formations containing natural gas. Although it has allowed a significant increase in gas and oil production, it has caused controversy due to its serious environmental and health impacts.
One of the most visible effects of fracking is the contamination of aquifers. In several extraction areas, pollution has been reported Methane and chemical leaks from fracking into groundwater, affecting the quality of drinking water. In addition, the excessive use of this technique has been linked to the increasing seismic activity in areas where this phenomenon was not previously evident.
Another concern about fracking is the high water consumption which entails, which aggravates the problems of water scarcity in some regions. The emission of volatile organic compounds during operations, causing a noticeable deterioration in local air quality.
Natural gas and its impact on public health
It is not only the environment that is affected by the use of natural gas. From a public health perspective, natural gas can contribute to the emission of fine particles and other toxic compounds that affect the population.
Burning natural gas generates emissions of nitrogen oxides, which although less than those of oil and coal, are sufficient to deteriorate the air quality in regions close to production centres. These particles are linked to serious respiratory diseases such as asthma, bronchitis, cardiovascular disease and even lung cancer.
In addition, a recent study from Harvard University has linked emissions from burning fossil fuels, including natural gas, with millions of premature deathsIn Spain, it is estimated that 18% of annual premature deaths are related to air pollution.
Alternatives to natural gas: the role of renewable energy
Given the environmental and health impact of natural gas, the search for alternatives has intensified. cleaner alternatives that can replace their use. Renewable energies such as solar and wind have gained prominence in the last decade as possible sustainable solutions that help mitigate climate change and reduce dependence on fossil fuels.
Over the past few years, the installation costs of solar panels and wind turbines have been reduced. significantly, which has allowed a rapid expansion of these technologies in several countries. In addition, the implementation of large-scale energy storage systems is solving the problem of intermittency that affects these sources.
However, in many parts of the world, gas continues to play an important role as a backup source for renewable energy and in stabilising the electricity grid. The key to a cleaner future will be to accelerate the transition to an energy system that favours the incorporation of renewable energy rather than continuing to invest in fossil infrastructure.
The challenge will not only be to reduce dependence on natural gas, but to do so in a way that does not require large investments in new gas infrastructure that could become obsolete in a future where renewables predominate.
The continued decline in renewable energy costs and the increasing adoption of energy storage technologies make it clear that the future must be driven by cleaner, more sustainable alternatives.
Ultimately, while natural gas has been touted as a cleaner solution within the fossil fuel framework, its environmental and health impact is considerable when assessed in all its aspects. While it can play a role in the transition to a more sustainable energy future, the focus must be on accelerating the adoption of renewable energy such as solar and wind.