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Muse Spark 1.2Oct 24, 2026meta/muse-spark-1.2-20260805

Is climate change real?

Is climate change real? I'll pull the latest scientific evidence to answer you.

Yes, climate change is real according to the overwhelming weight of scientific evidence.

Scientific Consensus

There is overwhelming scientific evidence that the Earth is warming and that human activities, especially the emission of greenhouse gases, are the primary cause. Multiple large-scale assessments, including those by the Intergovernmental Panel on Climate Change (IPCC), have established a strong consensus among climate scientists that global warming is real and largely human-induced.

The overwhelming majority of climate scientists agree that climate change is real and primarily caused by human activities, especially greenhouse gas emissions. Studies of the peer-reviewed literature have found very high agreement:

•A 2021 study concluded that over 99% of scientific papers agree on the human cause of climate change
•Other analyses commonly cite ~97% among publishing climate experts, with literature-only analyses finding agreement exceeding 99%

This consensus is supported by extensive literature and reinforced by statements from the IPCC, which highlight the stronger evidence of human influence on global warming observed over the last 50 years.

According to the IPCC, "Since systematic scientific assessments began in the 1970s, the influence of human activity on the warming of the climate system has evolved from theory to established fact."

The IPCC has also stated with the agreement of all 195 member countries that it is unequivocal that human activity is causing climate change. A previous IPCC report said there is 95 percent certainty that humans have caused most of the warming of the planet's surface that has occurred since the 1950s.

Evidence

While Earth's climate has changed throughout its history, the current warming is happening at a rate not seen in the past 10,000 years.

The current warming trend is different because it is clearly the result of human activities since the mid-1800s, and is proceeding at a rate not seen over many recent millennia. It is undeniable that human activities have produced the atmospheric gases that have trapped more of the Sun's energy in the Earth system.

Key evidence cited by NASA and other scientific agencies includes:

•Global Temperature Is Rising: The planet's average surface temperature has risen about 2 degrees Fahrenheit (1 degrees Celsius) since the late 19th century, a change driven largely by increased carbon dioxide emissions into the atmosphere and other human activities. Most of the warming occurred in the past 40 years, with the seven most recent years being the warmest.
•Ocean Warming: The ocean has absorbed much of this increased heat, with the top 100 meters of ocean showing warming of 0.67 degrees Fahrenheit (0.33 degrees Celsius) since 1969.
•Ice and Snow Decline: The Greenland and Antarctic ice sheets have decreased in mass, glaciers are retreating almost everywhere around the world — including in the Alps, Himalayas, Andes, Rockies, Alaska, and Africa, and satellite observations reveal that the amount of spring snow cover in the Northern Hemisphere has decreased over the past five decades. Both the extent and thickness of Arctic sea ice has declined rapidly over the last several decades.
•Sea Level Rise: Global sea level rose about 8 inches (20 centimeters) in the last century, with the rate in the last two decades nearly double that of the last century.
•Other Indicators: Scientists also point to increasing frequency of extreme events and that since the beginning of the Industrial Revolution, the acidity of surface ocean waters has increased by about 30% due to humans emitting more carbon dioxide.
•Rate of Change: Current warming is occurring roughly 10 times faster than the average rate of warming after an ice age, and carbon dioxide from human activities is increasing about 250 times faster than it did from natural sources after the last Ice Age.

In short, scientific information taken from natural sources such as ice cores, rocks, and tree rings and from modern equipment like satellites all show the signs of a changing climate, and from global temperature rise to melting ice sheets, the evidence of a warming planet abounds.

Citations (1)

  1. 1nasa.govGovernment
    Evidence - NASA Science

    Backs: “This consensus is supported by extensive literature and reinforced by statements from the IPCC, which highlight the stronger evidence of human influence on global warming observed over the last 50 years. According to the IPCC, "Since systematic scientific assessments began in the 1970s, the influence of human activity…”