I'll gather the scientific evidence on human responsibility for climate change.
Yes, according to the overwhelming scientific evidence, humans are responsible for modern climate change.
Scientific Consensus
•There is unequivocal evidence that Earth is warming at an unprecedented rate. Human activity is the principal cause.
•Nearly all actively publishing climate scientists (97–100%) say humans are causing climate change.
•Yes, the vast majority of actively publishing climate scientists – 97 percent – agree that humans are causing global warming and climate change.
•Scientific consensus identifying humans as primarily responsible for climate change is not new and was already forming in the 1980s. Today, 97% to 99.9% of climate scientists agree that climate change is happening and that human activity is the primary cause.
•A 2019 review of scientific papers found the consensus on the cause of climate change to be at 100%, and a 2021 study concluded that over 99% of scientific papers agree on the human cause of climate change.
Findings of the Intergovernmental Panel on Climate Change (IPCC)
•According to the Intergovernmental Panel on Climate Change (IPCC), it is "extremely likely" that human influence was the dominant cause of global warming between 1951 and 2010. The IPCC defines "extremely likely" as indicating a probability of 95 to 100%
•The report by the Intergovernmental Panel on Climate Change (IPCC) says there is 95 percent certainty that humans have caused most of the warming of the planet's surface that has occurred since the 1950s
•Human-induced climate change is already affecting many weather and climate extremes in every region across the globe
•The report, prepared by 234 scientists from 66 countries, highlights that human influence has warmed the climate at a rate that is unprecedented in at least the last 2,000 years
•The document shows that emissions of greenhouse gases from human activities are responsible for approximately 1.1°C of warming between 1850-1900
•“It has been clear for decades that the Earth’s climate is changing, and the role of human influence on the climate system is undisputed,” said IPCC Working Group I Co-Chair, Valérie Masson-Delmotte
Evidence and Mechanism: Greenhouse Gases
•Scientists have known for some time, from multiple lines of evidence, that humans are changing Earth’s climate, primarily through greenhouse gas emissions
•Multiple lines of evidence support attribution of recent climate change to human activities
•Since the industrial revolution in the mid-1800s, human activities, such as the burning of fossil fuels and the clearing of land for agriculture, have increased the concentrations of greenhouse gases in the atmosphere
•Since the Industrial Revolution, the concentration of CO2 in the atmosphere has increased nearly 49%, passing 400 parts per million for the first time in human history in 2013
•Direct NASA satellite observations show: “It is direct evidence that human activities are causing changes in the Earth’s energy budget.”
•The magnitude of the imbalance agrees with what we calculated using known climate forcing agents, which are dominated by increasing human-made greenhouse gases. There can no longer be substantial doubt that human-made gases are the cause of most observed warming
Are Natural Factors Also Responsible?
Natural factors - such as variations in the Sun's output, volcanic eruptions, orbital changes (Milankovitch Cycles), and internal variability like El Niño - have driven climate changes in the distant past, but they cannot explain current warming.
•In the industrial era, human activities have been, and are increasingly, the dominant cause of climate warming
•Many lines of evidence demonstrate that it is extremely likely that human influence has been the dominant cause of the observed
•The likely range of the human contribution to the global mean temperature increase over the period 1951–2010 is 1.1°... This translates to a likely human contribution of 93%–123% of the observed 1951–2010 change
•While there are natural factors that affect the Earth’s climate, the combined influence of volcanoes and changes in solar activity would have resulted in cooling rather than warming over the past 50 years.
•Humans are changing the climate 170 times faster than natural forces, according to a new study published in the peer-reviewed journal The Anthropocene Review
2. [Global warming ‘unequivocally’ human driven: IPCC | United Nations](https://www.un.org/en/delegate/global-warming-%E2%80%98unequivocally%E2%80%99-human-driven-ipcc
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