The Holocene extinction, or Anthropocene extinction, is the ongoing extinction event caused by humans during the Holocene epoch. These extinctions span numerous families of plants and animals, including mammals, birds, reptiles, amphibians, fish, and invertebrates, and affecting not just terrestrial species but also large sectors of marine life. With widespread degradation of biodiversity hotspots, such as coral reefs and rainforests, as well as other areas, the vast majority of these extinctions are thought to be undocumented, as the species are undiscovered at the time of their extinction, which goes unrecorded. The current rate of extinction of species is estimated at 100 to 1,000 times higher than natural background extinction rates and is increasing. During the past 100–200 years, biodiversity loss and species extinction have accelerated, to the point that most conservation biologists now believe that human activity has either produced a period of mass extinction, or is on the cusp of doing so. As such, after the "Big Five" mass extinctions, the Holocene extinction event has also been referred to as the sixth mass extinction or sixth extinction; given the recent recognition of the Capitanian mass extinction, the term seventh mass extinction has also been proposed for the Holocene extinction event.
Daniel Clarence Quinn was an American author, cultural critic, and publisher of educational texts, best known for his novel Ishmael, which won the Turner Tomorrow Fellowship Award in 1991 and was published the following year. Quinn's ideas are popularly associated with environmentalism, though he criticized this term for portraying the environment as separate from human life, thus creating a false dichotomy. Instead, Quinn referred to his philosophy as "new tribalism".
Resource depletion is the consumption of a resource faster than it can be replenished. Natural resources are commonly divided between renewable resources and non-renewable resources. The use of either of these forms of resources beyond their rate of replacement is considered to be resource depletion. The value of a resource is a direct result of its availability in nature and the cost of extracting the resource. The more a resource is depleted the more the value of the resource increases. There are several types of resource depletion, including but not limited to: mining for fossil fuels and minerals, deforestation, pollution or contamination of resources, wetland and ecosystem degradation, soil erosion, overconsumption, aquifer depletion, and the excessive or unnecessary use of resources. Resource depletion is most commonly used in reference to farming, fishing, mining, water usage, and the consumption of fossil fuels. Depletion of wildlife populations is called defaunation.
Overconsumption describes a situation where a consumer overuses their available goods and services to where they can't, or don't want to, replenish or reuse them. In microeconomics, this may be described as the point where the marginal cost of a consumer is greater than their marginal utility. The term overconsumption is quite controversial in use and does not necessarily have a single unifying definition. When used to refer to natural resources to the point where the environment is negatively affected, it is synonymous with the term overexploitation. However, when used in the broader economic sense, overconsumption can refer to all types of goods and services, including manmade ones, e.g. "the overconsumption of alcohol can lead to alcohol poisoning". Overconsumption is driven by several factors of the current global economy, including forces like consumerism, planned obsolescence, economic materialism, and other unsustainable business models and can be contrasted with sustainable consumption.
The Anthropocene ( ) is the common name for a proposed geological epoch, dating from the commencement of significant human impact on Earth up to the present day. It affects Earth's geology, landscape, limnology, ecosystems and climate. The effects of human activities on Earth can be seen for example in biodiversity loss and climate change. Various start dates for the Anthropocene have been proposed, ranging from the beginning of the Neolithic Revolution, to as recently as the 1960s as a starting date.
Richard William Heinberg is an American journalist and educator who has written extensively on energy, economic, and ecological issues, including oil depletion. He is the author of 14 books, and presently serves as the senior fellow at the Post Carbon Institute.
Doomer and, by extension, doomerism, are terms which arose primarily on the Internet to describe people who are extremely pessimistic or fatalistic about global problems such as overpopulation, peak oil, climate change, ecological overshoot, pollution, nuclear weapons, and runaway artificial intelligence. Some doomers assert that there is a possibility these problems will bring about human extinction.
Human overpopulation describes a concern that human populations may become too large to be sustained by their environment or resources in the long term. The topic is usually discussed in the context of world population, though it may concern individual nations, regions, and cities.
Deforestation during the Roman period was a result of the geographical expansion of the Roman Empire, with its increased population, large-scale agriculture, and unprecedented economic development. Roman expansion marks the transition in the Mediterranean from prehistory to the historical period beginning around 500 BC. Earth sustained a few million people 8,000 years ago and was still fundamentally pristine, but Rome drove human development in Western Europe and was a leading contributor of the deforestation around the Mediterranean.
References to climate change in popular culture have existed since the late 20th century and increased in the 21st century. Climate change, its impacts, and related human-environment interactions have been featured in nonfiction books and documentaries, but also literature, film, music, television shows and video games.
Background extinction rate, also known as the normal extinction rate, refers to the standard rate of extinction in Earth's geological and biological history before humans became a primary contributor to extinctions. This is primarily the pre-human extinction rates during periods in between major extinction events. Currently there have been five mass extinctions that have happened since the beginning of time all resulting from a variety of reasons.
Rupert Read is an academic and a Green Party campaigner, a former spokesperson for Extinction Rebellion, and the current director of the Climate Majority Project. He is the author of several books on Wittgenstein, philosophy, and/or climate change, most recently Why Climate Breakdown Matters, Deep Adaptation: Navigating the Realities of Climate Chaos, and Do You Want to Know the Truth? Until 2023, Read was a reader in philosophy at the University of East Anglia where he was awarded – as Principal Investigator – Arts and Humanities Research Council (AHRC) funding for two projects on "natural capital". His other major recent academic focus has been on the precautionary principle, having contributed substantially to work co-authored with Nassim Nicholas Taleb on applying the principle to questions of genetic modification of organisms. In further work, Read has theorised the utility of the precautionary principle in a wide range of areas, including: climate change, the environment, as well as financial and technology sectors.
William Robert Catton, Jr. was an American sociologist known for his scholarly work in environmental sociology and human ecology. More broadly, Catton is known for his 1980 book, Overshoot: The Ecological Basis of Revolutionary Change, which is credited by younger generations of environmental scholars and activists as foundational for their own works.
In environmental science, a population "overshoots" its local carrying capacity — the capacity of the biome to feed and sustain that population — when that population has not only begun to outstrip its food supply in excess of regeneration, but actually shot past that point, setting up a potentially catastrophic crash of that feeder population once its food populations have been consumed completely. Overshoot can apply to human overpopulation as well as other animal populations: any life-form that consumes others to sustain itself.
Louis (Louie) Psihoyos is an American photographer and documentary film director known for his still photography and contributions to National Geographic. Psihoyos, a certified SCUBA diver, has become increasingly concerned with bringing awareness to underwater life. In 2009, he directed and appeared in the feature-length documentary The Cove, which won an Oscar for Best Documentary Feature.
Cowspiracy: The Sustainability Secret is a 2014 American documentary film produced and directed by Kip Andersen and Keegan Kuhn. The film explores the impact of animal agriculture on the environment—examining such environmental concerns as climate change, water use, deforestation, and ocean dead zones—and investigates the policies of several environmental organizations on the issue.
Guy R. McPherson is an American scientist, professor emeritus of natural resources and ecology and evolutionary biology at the University of Arizona. He is known for inventing and promoting doomer fringe theories such as Near-Term Human Extinction (NTHE), which predicts human extinction by 2026.
Extinction Rebellion is a UK-founded global environmental movement, with the stated aim of using nonviolent civil disobedience to compel government action to avoid tipping points in the climate system, biodiversity loss, and the risk of social and ecological collapse. Extinction Rebellion was established in Stroud in May 2018 by Gail Bradbrook, Simon Bramwell, Roger Hallam, Stuart Basden, along with six other co-founders from the campaign group Rising Up!
Planet of the Humans is a 2019 American environmental documentary film written, directed, and produced by Jeff Gibbs. The film was executively produced by Michael Moore. Moore released it on YouTube for free viewing on April 21, 2020, the eve of the 50th anniversary of the first Earth Day.
Extinction: The Facts is a 2020 documentary film by the natural historian David Attenborough which aired on the BBC. It depicts the continuing sixth mass extinction, caused by humans, and the consequences of biodiversity loss and climate change. It also suggests positive action which can be taken to halt or reverse these effects. With a peak viewership of roughly 4.5 million on its premiere, the programme received positive critical reception.
