Industrial revolution, how it affected the environment (intro)
More than two centuries ago, a wave of change swept across the Great Britain and eventually, the entire world. Facotries rose instead of the fields that were once there, and engines roared to life with cities attracting workers all over the world for opportunities. This period is nowadays referred to as the Industrial Revolution, which is often celebrated as one of humanity's greatest leap toward the modern era. The revolution brought machines that were efficient of the workload of dozens of men, railways that decreased the time of post mailingm and goods became cheaper and more available for a lot of families. On the other hand, such revolution did not only bring us comfort and joy.
COAL
The engines that drove transportation and machinery were quite remarkable. They worked with the use of coal, which soon became the backbone of the industry. Factories that had once relied on human labor could now work more efficiently with machinery. Burning coal on such a massive scale, however, released enormous quantities of carbon dioxide into the atmosphere, planting the earliest seeds of a much larger problem. It's important to separate the start of that problem from its full modern consequences. British coal-powered industrialization contributed to the long-term buildup of greenhouse gases, but the roughly 1.1°C of human-caused warming the planet has experienced was produced by cumulative global emissions over more than two centuries, not by the factories of the original Industrial Revolution alone.
Before industrialization, carbon dioxide levels in the atmosphere hovered around 275 parts per million. Today, that number has climbed past 415 parts per million, and the pace of increase continues to accelerate. Methane and nitrous oxide, two other greenhouse gases, have also risen sharply since the 1700s. These invisible changes in the air set the stage for the climate challenges the world faces today.
Poisoned water and polluted air
The smog hanging over industrial cities reached such extremes that it left a visible mark on wildlife. The peppered moth, common across England, offers a striking example. Pale and dark forms of the moth had always existed side by side, but the pale form was normally better camouflaged against light-colored, lichen-covered tree bark. As soot blackened trees across industrial regions, that camouflage reversed: the dark form now blended in better and was less likely to be spotted and eaten by birds. Because dark moths survived and reproduced at higher rates, they became increasingly common in polluted areas over successive generations, while pale moths grew rarer. No individual moth changed color, industrial pollution simply changed which existing color survived, making the peppered moth one of the clearest documented cases of natural selection in action.
Rivers suffered just as badly, since no environmental laws or oversight existed to protect them. Factory owners routinely dumped chemical waste, dyes, and heavy metals straight into nearby waterways. These actions caused rivers like the Thames to become so contaminated that fish and other wildlife could no longer survive, collapsing local aquatic habitats. Human populations that depended on the rivers for washing, drinking, and fishing faced serious disease risks as a result. In London, this crisis came to a head in 1858, when an unusually hot summer intensified the stench of sewage and industrial waste piled along the Thames's banks, an event known as the Great Stink. The smell grew so overwhelming that it drove Parliament to act, commissioning engineer Joseph Bazalgette to design an entirely new sewer system, a project that took over a decade to build and ultimately ended the direct dumping of raw sewage into the river.
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