Is climate change real?

Yes, climate change is real.

There is an overwhelming scientific consensus—with between 97% and 100% of actively publishing climate scientists agreeing—that the Earth’s climate is warming and that human activities are the primary driver. Leading scientific organizations worldwide, including NASA, the National Oceanic and Atmospheric Administration (NOAA), and the Intergovernmental Panel on Climate Change (IPCC), have confirmed this based on decades of rigorous, peer-reviewed data.

Why Is It Happening?

The primary cause of modern climate change is the human expansion of the greenhouse effect.

Since the Industrial Revolution (starting in the mid-19th century), humans have burned fossil fuels like coal, oil, and gas to power homes, factories, and vehicles. Burning these materials releases greenhouse gases—primarily carbon dioxide (CO₂) and methane—into the atmosphere.

These gases act like a blanket wrapped around the Earth, trapping heat from the Sun that would otherwise escape into space. Today, CO₂ levels in the atmosphere are higher than they have been in over 3 million years.

What Is the Evidence?

Scientists track global climate change using data collected from satellites, ocean buoys, weather stations, and ancient ice cores. This body of evidence is extensive and consistent across multiple indicators:

1.Rising Global Temperatures: The planet’s average surface temperature has risen by about 2 degrees Fahrenheit (over 1 degree Celsius) since the late 19th century. The last decade has been the warmest on record since modern record-keeping began in 1880.

2.Warming Oceans: The oceans absorb more than 90% of the excess heat trapped in the atmosphere. Water temperatures in the upper portion of the ocean are rising rapidly.

3.Shrinking Ice Sheets and Glaciers: The ice sheets in Greenland and Antarctica are losing hundreds of billions of tons of mass per year. Glaciers in mountain ranges worldwide (like the Alps, Himalayas, and Rockies) are in rapid retreat.

4.Rising Sea Levels: Global sea levels have risen significantly due to two main factors: water melting from glaciers and ice sheets on land, and the "thermal expansion" of seawater (water expands as it gets warmer).

5.Extreme Weather Events: Across the globe, scientists are observing a higher frequency and intensity of extreme weather events, including more severe droughts, longer heatwaves, larger wildfires, and heavier, more damaging rainfall.

6.Ocean Acidification: The oceans have absorbed about 30% of the carbon dioxide emitted by humans. This excess carbon dioxide chemically reacts with seawater, making the oceans more acidic and threatening marine life, particularly coral reefs and shellfish.

How Do We Know It Isn't Natural?

The Earth’s climate has changed in the past due to natural factors, such as shifts in the planet's orbit, volcanic eruptions, or changes in solar activity. However, scientists have carefully analyzed these natural cycles and concluded that natural forces alone cannot explain the rapid warming observed over the last 150 years.

For instance, solar activity (the energy output of the Sun) has remained relatively stable or even slightly decreased over the last several decades, yet global temperatures have soared. Only the addition of human-made greenhouse gases matches the patterns of warming we see today.

Citations (8)

1nasa.govGovernment
nasa.gov
Backs: “There is an overwhelming scientific consensus—with between 97% and 100% of actively publishing climate scientists agreeing—that the Earth’s climate is warming and that human activities are the primary driver. Leading scientific organizations worldwide, including NASA, the National Oceanic and Atmospheric…”
2wikipedia.orgEncyclopedias and referencequality 0.83
wikipedia.org
Backs: “There is an overwhelming scientific consensus—with between 97% and 100% of actively publishing climate scientists agreeing—that the Earth’s climate is warming and that human activities are the primary driver. Leading scientific organizations worldwide, including NASA, the National Oceanic and Atmospheric…”
3nasa.govGovernment
nasa.gov
Backs: “Leading scientific organizations worldwide, including NASA, the National Oceanic and Atmospheric Administration (NOAA), and the Intergovernmental Panel on Climate Change (IPCC), have confirmed this based on decades of rigorous, peer-reviewed data.”
4nasa.govGovernment
nasa.gov
Backs: “The primary cause of modern climate change is the human expansion of the greenhouse effect. Since the Industrial Revolution (starting in the mid-19th century), humans have burned fossil fuels like coal, oil, and gas to power homes, factories, and vehicles.”
5nasa.govGovernment
nasa.gov
Backs: “Since the Industrial Revolution (starting in the mid-19th century), humans have burned fossil fuels like coal, oil, and gas to power homes, factories, and vehicles. Burning these materials releases greenhouse gases—primarily carbon dioxide (CO₂) and methane—into the atmosphere.”
6youtube.comSocial media and video
youtube.com
Backs: “Today, CO₂ levels in the atmosphere are higher than they have been in over 3 million years. ---. What Is the Evidence?”
7nasa.govGovernment
nasa.gov
Backs: “Scientists track global climate change using data collected from satellites, ocean buoys, weather stations, and ancient ice cores. This body of evidence is extensive and consistent across multiple indicators:”
8nasa.govGovernment
nasa.gov
Backs: “Warming Oceans: The oceans absorb more than 90% of the excess heat trapped in the atmosphere. Water temperatures in the upper portion of the ocean are rising rapidly.”