A new study from scientists at the University of Bristol shows environmental change is happening at an unprecedented rate. (Copyright Randall Hyman Photography)

A published in the journal Nature Geosciencesandconducted by researchers at the University of Bristol's Cabot Institute found that the pace ofenvironmental change is occuring faster now than at any other previous time in the Earth's history.

"The rate of change was considerably slower in the past," lead author David Naafs told weather.com.

Naafs and his research team showed that previous environmental change events that occurred naturally happened potentially a "thousand times slower than today."

The scientistsexamined marine rock outcrops in southern Spain and Tunisia, which were previously underwater, and measured the geochemical impact of a major environmental change event, which was deemed a suitable analog to present human activity, that occurred 120 million years ago, and its effect on ocean acidification. The study showed that volcanic outgassing increasedatmospheric carbon dioxide for approximately1.5 to 2 million years, but the rate of change was considerably slower than what is being observed in the present day.

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The study's findings raise flags on current ocean acidification levels, which have become an increasing concern among environmentalists. Mother Jones's Julia Whitty that the data from the 2013 Arctic Ocean Acidification Assessment indicated that Arctic marine waters were experiencing "widespread and rapid ocean acidification," with surface waters "30 percent more acidic than at the start of the Industrial Revolution."

Rich Pancost, senior author of the study, said in a press release that he felt that studying historical planetary change was important for understanding the severity of pressures on the environment today and hoped that the actions taken at the2015 United Nations Climate Change Conference would help assuage man-made carbon dioxide levels.

"We often use the geological record to help us test or expand our understanding of climate change, for example, determining the sensitivity of Earth’s temperature to higher CO2 levels," Pancost said.

"But testing the risks associated with the pace of modern environmental change is proving problematic, due to a lack of similar rapid changes in the geological past. Consequently, these risks, in this case to the marine ecosystems on which so many of us depend, remain associated with profound uncertainty," he added. "Decreasing CO2 emissions, as recently agreed in Paris, will be necessary to avoid these risks."

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Orlando, Florida, is one of the most visited places in the United States, a fact that has spurred its development during the past three decades. The next six images show just how much the city has expanded. This image is from January 1982. (NASA)