What is global warming and what is causing it?

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Global warming

The rapid and ongoing changes in the Earth’s average temperatures are continually measured and addressed by hundreds of national, international, and non-governmental organizations worldwide.

Anyway, there is still a common misconception regarding some of the fundamental terms related to the subject: namely climate change and global warming. Intuitively, they seem like one and the same thing – merely because the current climate change tendencies are associated with accelerated warming.

Still, climate change and global warming stand for a different set of occurrences. It means that they have different preconditions, different postulates and mechanisms of unfolding, and finally – different causes. Today, we are shedding some light on the subject of global warming – what it is, what provokes it, how does it progress over time, and finally – what is there to be done about it.

What is global warming?

For the sake of perfect clarity, let us first clearly outline the fundamental difference between climate change and global warming.

Climate change is cyclic; it’s not at all unnatural, and it has actually happened many times throughout the history of our planet. Earth’s climate can change spontaneously as a result of both human-related and naturally occurring environmental processes – they include ocean patterns movement, volcanic activity, variations in the Sun’s energy output, fluctuations in the Earth’s orbit, and so on.

Global warming, on the other hand, is an entirely human-related occurrence. It is linked to the human population’s way of life after the pre-industrial period (1850-1900) and its unnatural impact on the climate of the Earth. It is said to have a significant influence on the alarming global temperature graphs for the last decades, producing abnormal changes in the Earth’s local, regional, and general heat patterns.

Put shortly: global warming is the long-term heating of Earth’s climate that happens as a result of human actions. Now that we have this definitive explanation, we can dig deeper into what generates global warming and how decision-makers can positively reshape the disturbing tendencies.

What causes global warming?

The global warming effect emerges as an unavoidable consequence of three main human population activities. These are the heavy fossil fuel burning, the massive deforestation, and the ever-increasing livestock farming.

Those three factors constitute the continuous generation of tremendous amounts of greenhouse gases in the Earth’s atmosphere. Added to the naturally occurring gases, they produce a catastrophic effect that our ecosystem simply cannot handle. What happens next is the so-called “greenhouse effect” – a situation where gases trap the sun’s heat and prevent it from flowing back into space where it belongs.

Logically, this leads to unwanted, unexpected, and rather unpleasant changes in how our Earth functions. According to the National Oceanic and Atmospheric Administration dataset, all the ten warmest years on record so far had happened during the 21st century. Just to let you know – 2020 is currently holding second place in this highly non-prestigious rank list.

To sum it up: global warming is provoked by unnatural greenhouse gases, and unnatural greenhouse gases are produced by people. Simple, and rather unbrilliant.

Gases that contribute to the greenhouse effect

Greenhouse effect

There are several gases that occur naturally in the atmosphere but are not meant to jump over a certain level of concentration. Higher emissions of them contribute to the greenhouse effect and its subsequent effects on our climate. These gases include:

  • Carbon dioxide. As published in the Energy, climate change and environment section of the European Commission, carbon dioxide (CO2) is accountable for about 64% of human-made global warming. According to data published by NASA, the concentration of CO2 in the atmosphere had increased by an alarming 47% since the beginning of the Industrial Revolution.

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  • Water vapour. This is also among the most abundant greenhouse gases produced by human-initiated activities. As the annual global temperature increases, water vapour amounts increase, and along with them – the clouds and precipitation patterns in matters of frequency and quantity.
  • Methane. Methane is generated mainly by waste decomposition and manure management in livestock breeding. By definition, methane causes a worse greenhouse effect than carbon dioxide does – a reason why its lower abundance is great news and its increasing – terrible news.
  • Chlorofluorocarbons. CFCs are synthetic chemicals that contain atoms of carbon, chlorine, and fluorine. Their use is mainly related to the industrial manufacturing of aerosol sprays, solvents, and refrigerants, while large amounts of their compounds are released into the atmosphere meanwhile. CFCs are lately an object to strict regulations since they are proven to destroy the ozone layer of the Earth.
  • Nitrous oxide. As of 2020, this powerful greenhouse gas is estimated to be responsible for about 6% of human-made global warming. It is mainly generated by artificial processes such as soil cultivation, the use of fertilizers, and the burning of different biomasses.

Other greenhouse gases that accelerate the process of global warming include, for example, perfluorocarbons, hydrofluorocarbons, nitrogen trifluoride, and sulfur hexafluoride. They are released as a result of a variety of industrial processes, heavily misapplied by manufacturers all over the globe.

How is global warming linked to climate change?

Though climate change occurs naturally due to environmental phenomena beyond human control, human interference has dramatically accelerated the process in the past decades.

Speaking in numbers – in a recent report, the United Nations concluded that there is over 95 percent chance that human activity over the past fifty years has contributed to the ongoing global warming trend.

At the end of the day, combining natural and civilizational factors generates a steady increase in the global average temperature. That’s precisely how global warming and climate change merged to establish a startling tendency: the global average temperature had risen by about 1 degree Celsius since pre-industrial times and is presently rising by 0.2 degrees Celsius every next decade.

As a result of global warming, the Earth’s climate changes in many ways monitored from ground, air, and space simultaneously. Among them are the higher temperatures of the land and the oceans, massive ice melts, and more frequent severe weather conditions such as drought, heatwaves, and wildfires to begin with.

What are the causes of climate change?

As mentioned, multiple times already, the leading originator of rising greenhouse emissions is human consumer behaviour and lifestyle organization. The over-stacked supply needed to keep civilization going literally feeds on the planet’s resources and leaves it struggling with the resulting vapour waste.

The industrial production of food and goods, the movement pace of people and stock, and the continuous plantation of areas that used to be rainforests are the main culprits behind the greenhouse effect we observe. Below, we will discuss both human and natural changes to the climate in detail – one by one.

Human causes of climate change

The most widely recognized and also most threatening human activities that provoke global warming and changes to the climate include:

Climate Change Causes

  • Burning of fossil fuels such as oil, coal, and gas at an unprecedented pace. The process is utilized throughout literally all countries and industries as the primary source of energy and heat. Unfortunately, it releases massive amounts of carbon dioxide and nitrous oxide into the atmosphere. Switching to renewable energy sources is probably the only way around an ecological catastrophe that lingers just around the corner.
  • Continuous deforestation and tree-cleaning. For the sake of farming, aggressive urbanization, and rapid infrastructure expansion, people keep on demolishing forests and bushlands – a vital way for Earth itself to absorb carbon dioxide from the air and fill it with vitally important oxygen instead.
  • Farming and agriculture. Animals’ biological waste, soil fertilizers, and crop production generate a considerable amount of potent greenhouse gases that keep on steaming up the Earth as we speak. That is probably the most troubling of the factors mentioned so far since consumerism culture is not close to even recognizing the issue, in contrast to the problems discussed above.
  • Cement production. Though not as popular as the rest of the factors listed, cement production is yet another contributor to human-induced climate change. Current data reveals that the process is causing a surprising 2% of humanity’s total carbon dioxide emissions, which is actually a lot.

Adopting sustainable practices and conscious behaviour in these areas is both a societal and personal challenge. From the global decision-makers to local producers and end-users – there is something to be done every step of the way. And – yes – every single step matters a great deal.

Natural changes to the climate

As if human damage is not enough, several absolutely natural factors tend to worsen climate change even further. The most important among them, besides natural cycles themselves, include:

  • Solar irradiance. The increase in solar energy can conceivably warm up the atmosphere of the Earth, or at least some of its layers. Anyway, it is not proven to potentially result in radical climate changes like those we are currently witnessing.
  • Volcanic eruptions. Erupting volcanoes release carbon dioxide that can warm up the Earth’s climate. On the other hand, though, they also produce aerosol particles with a cooling effect to restore the balance. Humans are estimated to generate 50 times more carbon dioxide than volcanoes do; unfortunately, the same cannot be said about aerosol particles.
  • Ocean patterns. El Niño Southern Oscillation, for example, is a pattern of changing water temperatures in the Pacific Ocean. It can affect the global climate for several or several years in a row; still, these changes are naturally reversible and cannot explain the steadfast warming we register in recent decades.
  • The Milankovitch cycles. Put simply, these are cosmic cycles that influence the quantity of sunlight that falls on planet Earth. Anyway, they are occurring over “tens or hundreds of thousands of years” and thus are probably not to blame for the catastrophe people are bringing along themselves.

All in all, nature has its ways, and people were never supposed to interfere so viciously. What we managed to “accomplish” as a species is unprecedented, and the damage we’ve done is far beyond any terrestrial or extraterrestrial factor until now.

So, is there a way around catastrophe? The good news is that science says there still is. The bad news – it’s a way that has to be chosen consciously, taken immediately, and walked till the end.

Are we ready to go?

Read about the small changes that you can adopt in your day to day life and reduce your footprint:

 

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