By: Jason Gerber

In his book, “Unraveling the Tapestry of Life and Civilization: The Causes and Consequences of Climate Change (and Other Threats to Biodiversity),” Dr. Marcus Gillespie explores the science behind climate change, its impact on our planet, and the path toward a sustainable future.

Before going into the complexities of climate change, Dr. Gillespie first addresses the issues associated with the lack of trust in the scientific community regarding climate change. Many skeptics of climate change argue that the scientific position is a matter of mere opinion or ideology. In response to this position, Dr. Gillespie addresses many sources of misinformation, but he begins by first asking the reader to consider a fundamental question regarding the natural world; namely, can we fight against the laws of nature and win?

The answer, of course, is a definite “No”. Consider, for example, the Law of Gravity. If you jump off a cliff, you’re going to fall—whether you want to or not. Flailing your arms and wishing you weren’t falling will not change the fact that you are falling. Just as the Law of Gravity inexorably causes us to fall if we jump off a cliff, so, too will the addition of greenhouse gases to the atmosphere warm the planet. This is because the laws of nature pertaining to radiation control this. As with the Law of Gravity, we cannot fight and win against the laws governing the heating of the planet caused by the addition of greenhouse gases to the atmosphere.

The heating caused by the addition of greenhouse gases (GHGs) is called the “Greenhouse effect”; and, by way of analogy, adding GHGs warms the planet just as adding a blanket to your bed will keep you warmer at night.

To elaborate a little more on this idea, imagine sunlight streaming into the Earth’s atmosphere. Some of this energy is reflected back into space and causes no heating, but some is trapped by GHGs in the atmosphere, and by trapping this energy, these gases act like a giant blanket. When the incoming and outgoing energy are balanced “properly”, this balance keeps our planet warm enough to sustain life—not too hot and not too cold.

The Greenhouse Effect: A Balancing Act

Think of this balance between incoming and outgoing energy as maintaining a balance of energy gains and losses. This balance maintains a range of temperatures on Earth, just like a thermostat does in your home by regulating how much the air is heated or cooled. Sunlight streaming into the atmosphere is the equivalent of turning up the heat, whereas the loss of energy to space is the equivalent of turning down the thermostat. If the thermostat works properly, the balance between heat energy gained and heat energy lost maintains a range of comfortable temperatures. But, if the thermostat is turned up and won’t shut off, the temperature will keep getting hotter and hotter. Similarly, If the amount of GHGs in the atmosphere, such as carbon dioxide (CO2) and methane (CH4), increases in amount, it will reset the thermostat to a higher temperature. It’s going to get hotter. Returning to the blanket analogy, the extra GHGs will act like a thicker blanket.  Again, this warming is based on laws of nature, and it is inevitable. So, claiming that climate change is a myth is the equivalent of claiming that the Law of Gravity is a myth. We know that isn’t true, and we know we will fall if we jump off of a cliff. It is a fact that we cannot beat the laws of nature. Wishing it were not so will not change reality.

CO2: Adding More Blankets

Dr. Gillespie emphasizes that even though the CO2 comprises only about 0.04% of the atmosphere, it nonetheless plays a crucial role in maintaining Earth’s comfortable temperature. However, human activities, primarily the burning of fossil fuels like coal, oil, and natural gas, are rapidly increasing the concentration of CO2 in the atmosphere. The concentration of other GHGs are also increasing as a result of human activities. The more CO2 and other GHGs emitted into the atmosphere, the more heat that gets trapped, leading to a rise in global temperatures. With multiple GHGs being added to the atmosphere, we’re adding many metaphorical blankets to our bed.

The Laws of Physics: Undeniable and Unbreakable

As noted above, the physics behind the greenhouse effect is not a matter of opinion or debate. It’s a fundamental law of nature, as undeniable as gravity. We can’t argue with gravity, and we can’t change the basic physics of how heat interacts with the greenhouse gases in our atmosphere. Dr. Gillespie emphasizes this point because understanding the core science behind climate change is crucial to dispelling misinformation about climate change, and addressing its challenges.

Final Words: Understanding the Consequences

The book “Unraveling the Tapestry of Life and Civilization: The Causes and Consequences of Climate Change (and Other Threats to Biodiversity),” establishes the undeniable role of human activity in altering Earth’s energy balance. Dr. Gillespie explains the potential consequences of a warming planet, including rising sea levels and extreme weather events, disrupted ecosystems, and threats to food security, as well as many of the socio-economic impacts. No one can escape the consequences of climate change because it affects the entire planet.

He doesn’t minimize the challenges facing us, but he also explores potential solutions and mitigation strategies that can help us navigate this critical juncture in our history.

By understanding the basic physics of the greenhouse effect and acknowledging the undeniable role of human activity, we can develop a more informed approach to addressing climate change.

Dr. Gillespie’s book aims to be a valuable resource for anyone seeking to understand the science behind this critical issue and explore potential solutions for a sustainable future.

Published by: Khy Talara