Essay Undergraduate 357 words

Human Causes of Climate Change and the Greenhouse Effect

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Abstract

This paper examines the relationship between human industrial activity and climate change, situating anthropogenic factors within the broader context of natural climate drivers. It outlines the four pre-industrial causes of climate change — orbital variations, atmospheric carbon dioxide levels, volcanic eruptions, and solar output — before arguing that human activity since the Industrial Revolution constitutes an emerging fifth major factor. The paper also explains how large-scale agriculture, livestock production, and fossil fuel combustion intensify the naturally occurring greenhouse effect through elevated emissions of methane, nitrous oxide, and carbon dioxide. Observable evidence, including unusual weather patterns, polar ice melt, and ecosystem disruption, is presented in support of the human contribution to global warming.

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What makes this paper effective

It establishes a clear baseline of natural climate drivers before introducing human factors, giving the argument a logical "before and after" structure that is easy to follow.
It distinguishes between different greenhouse gases — methane, nitrous oxide, and carbon dioxide — and links each to specific human activities, adding precision to the analysis.
The conclusion avoids overstatement by acknowledging that humans are not responsible for all climate change, which strengthens the paper's credibility and analytical balance.

Key academic technique demonstrated

The paper uses a compare-and-contrast technique to build its argument: natural processes are introduced first as an established baseline, and human-induced factors are then layered on top. This approach shows how anthropogenic activity amplifies existing natural systems rather than operating in isolation, a methodologically sound way to frame causation in environmental science writing.

Structure breakdown

The paper opens with the four pre-industrial causes of climate change, then transitions to the argument that industrialization has added a fifth human factor. The second half shifts focus to the greenhouse effect, explaining its natural function before detailing how human emissions exacerbate it. The paper closes with observable evidence — weather anomalies, ice melt, and ecosystem changes — and a measured conclusion about the human contribution to climate change.

Natural Drivers of Climate Change

Before the Industrial Revolution, climate change was caused mainly by four fundamental factors: variations in the Earth's orbital characteristics; variations in the Earth's atmospheric carbon dioxide levels; volcanic eruptions; and variations in solar output. These natural forces have shaped the planet's climate over millions of years, producing cycles of warming and cooling long before human civilization emerged.

Due to the amount and types of chemicals emitted by humans into the atmosphere since the Industrial Revolution, it is highly likely that human beings are becoming a fifth major factor causing climate change on Earth. It might be impossible to track long-term trends definitively, since human beings have only been industrialized for about a century. Nevertheless, the evidence for human-caused climate change is strong.

Human Activity as an Emerging Climate Factor

The greenhouse effect occurs naturally in the Earth's atmosphere: a protective layer of gases insulates the Earth and keeps its temperature regulated, far warmer than it would be without this effect. However, due to large-scale agricultural and farm animal production, the greenhouse effect is being exacerbated by human activity.

The Greenhouse Effect and Its Enhancement

High levels of methane are being released into the Earth's atmosphere at concentrations that would not occur naturally. The same is true for other greenhouse gases such as nitrous oxide. By far the most notorious greenhouse gas potentially causing the Earth to become consistently warmer over time, however, is carbon dioxide, which is released into the atmosphere by factories as well as automobiles.

The combination of these human factors with the natural factors described above — including variations in the Earth's orbit — could be causing more rapid and more severe climate change than would otherwise occur.

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Evidence for Human-Induced Climate Change · 65 words

"Observable signs of anthropogenic climate disruption"

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Key Concepts in This Paper

Greenhouse Effect Carbon Dioxide Methane Emissions Industrial Revolution Orbital Variations Global Warming Polar Ice Melt El Niño Anthropogenic Factors Nitrous Oxide