Climate Change Facts

Climate Change Facts & Statistics

Your immediate environment might seem in great condition, yet there’s no doubt we should be concerned about rising global temperatures. You may look around you and wonder, “Is the climate really changing? How do we know it is? Can we stop it?'' Below, we look at a curated selection of climate change facts that help to answer those questions.

35 Facts About Climate Change and Global Warming

General Climate Change Facts
Photo shows scientists launching an Ozonesonde Balloon that can rise to as high as 115000 feet and returns climate-relevant measurements to a ground station. Credit: NOAA on Unsplash.

General Climate Change Facts

#1 - The last ice age was about 11,700 years ago4

#2 - there have been seven cycles of glacial growth and shrinking in the past 650,000 years4

Climate change is not new. Glaciers have shrunk and increased seven times over the last 650,000 years. The earth sometimes experiences a slight shift in its orbital path. This causes the amount of solar energy reaching the earth to change. Changes in the planet’s climate have been regular, so why is the current global temperature change causing so much concern?

Compared to the changes that used to occur, evidence reveals that current global warming is happening ten times faster than it used to. This is problematic because the rate at which the earth is warming is higher than the average rate it takes to cool down.

Human Activity

#3 - The warming trend the earth is presently undergoing is over 95% likely to have been caused by human activities2

With the industrial revolution, human activities were no longer as labor-intensive and time-consuming as they used to be. Mechanization, large-scale manufacturing, and the rise of factories serving a global consumer demand all demanded energy.

The industrial revolution has resulted in human activities that release large amounts of carbon dioxide into the atmosphere. Primarily, drilling, mining, and burning fossil fuels generated the energy and raw materials required to fuel our progress. Scientists have since gathered evidence that Co2, released as a function of industrialization, has increased and contributes to global warming.

#4 - Carbon dioxide resulting from human activities is increasing over 250 times faster than carbon dioxide resulting from natural resources since the last ice age3

Carbon dioxide amounts for more than half of the amount of greenhouse gas in the atmosphere. A large part of atmospheric carbon dioxide results from burning fossil fuels, solid waste, trees, and other biological materials. Plants absorb carbon dioxide, removing them from the atmosphere.

Other greenhouse gases are methane, nitrous oxide, water vapor, and fluorinated gases. The production and transportation of natural gas, oil, and coal release methane. Livestock and organic waste in landfills also contribute to the emission of methane. Wastewater treatment, some industrial and agricultural activities release nitrous oxide. And fluorinated gases are potent human-made gases emitted from some industrial process.

Recent Increases

#5 - The planet’s average surface temperature has risen about 2.05 degrees Fahrenheit since the late 19th century[ref]

#6 - For the most part, global warming took place in the past 40 years[ref]

The global climate is changing and not for the better. Plants are flowering sooner, glaciers are melting, and ice on rivers are breaking. This is happening because of excessive greenhouse gas emissions resulting in an adverse greenhouse effect. Greenhouse gases trap heat in the earth’s atmosphere. This keeps the planet comfortably warm at a global average of 15 degrees celsius; we call this the greenhouse effect. The greenhouse effect keeps the earth habitable. However, greenhouse gas emissions have skyrocketed in recent times, and now, the world is becoming hotter.

#7 - Global average temperature has increased by about 1.8 degrees Fahrenheit from 1901 to 2016[ref]

#8- Researchers predict climate change to cause an approximate additional 250,000 deaths yearly by 2030-20505

As air temperatures heat up, it adversely affects people suffering from cardiovascular and respiratory diseases. Weather-related natural disasters have become more frequent and stronger since 1960. This has caused about 60,000 deaths in developing countries.

#9 - In the heatwave of summer 2003 in Europe, there were over 70,000 additional deaths6

Our health, environment, and livelihood are in grave danger from climate change. This is because the changes in climate impact many of the social and environmental determinants of our wellbeing negatively. Heavy rainfall, sea-level rise, and heatwaves threaten our planet and we who live on it.

#10 - The warmest years on record took place since 2014, with 2016 being the warmest year on record[ref]

Impact of Climate Change: The Environment

Climate Change Environment

#11 - The world has warmed by an approximate amount of 0.85 degrees Celsius in the past 130 years[ref]

Climate change has had visible effects on the environment; it has affected plants and animals. Animals that live in the ice regions are facing possible habitat loss as sea ice continues to melt. In Greenland and Antarctica, the ice sheets are shrinking rapidly and contributing to sea-level rise. In warmer parts of the planet, climate change has increased the frequency of wildfires and intense heat waves.

#12 - The top 100 meters of the ocean have warmed more than 0.6 degrees Fahrenheit due to global warming since 19694

#13 - Experiments show that Greenland lost an average of 279 billion tons of ice per year between 1993 and 20197

#14 - Experiments show Antarctica lost an average of 148 billion tons of ice per year between 1993 and 20197

#15 - The sea levels worldwide rose about 8 inches in the last decade8

#16 - 95% of cities facing extreme risks from climate change are in Africa and Asia[ref]

#17 - The number of reported natural disasters due to weather has tripled since the 1960s[ref]

Not just about warming

#18 - The acidity of surface ocean waters has risen 30% since the start of the industrial age[ref]

Industrial activities are often powered by fossil fuels or involve other processes that release carbon dioxide into the atmosphere. The ocean stores the earth’s excess energy, and the more Co2 released, the more the ocean absorbs.  This has led to the ocean becoming more acidic. The ocean also absorbs much of the heat that results from climate change. The first 382 feet of the ocean show a warming of 0.33 degrees celsius. The UN warns that we need to limit climate change to below 1.5 degrees Celsius above the pre-industrial level.

#19 - The ocean has absorbed between 20% to 30% of total anthropogenic carbon dioxide emissions in recent decades9

#20 - The ocean absorbs 7.2 to 10.8 billion metric tonnes of anthropogenic carbon dioxide per year9

Impact of Climate Change: Human Health

#21 - Aeroallergens such as pollen and others have higher levels during extreme heat, which can trigger asthma, affecting around 300 million people worldwide[ref]

#22 - Over 40% of the world’s population lives within 60 miles of the coast and are at risk due to rising sea levels globally10

As temperatures keep rising, sea levels will continue to rise, ice sheets will keep melting, and precipitation patterns change. All these endanger our lives. Extreme weather events that cause deaths are becoming more intense and frequent. Sea level rises, and extreme weather events will destroy homes and infrastructure, forcing people to move to “safer” places. Such movements will eventually result in overpopulation of those areas, which puts health and wellbeing in danger.

#23 - Variable rainfall patterns affect the supply of clean water; this results in unsafe water supplies, which increase the risk of diarrhoeal disease that kills over 500,000 children under the age of 5 yearly[ref]

Unsafe water compromises hygiene, exposing people to water-borne diseases like cholera, typhoid fever, and diarrhea. Climate change causes more frequent rainfall and flooding in some places; this contaminates the clean water supply. Contaminated water breeds diseases and mosquitoes. Climate strongly influences the Anopheles mosquito, which transmits malaria. Floods also cause the loss of lives and property.

#24 - Malnutrition and undernutrition cause some 3.1 million deaths every year. Rising temperatures and inconsistent rainfall due to climate change look set to increase that number as staple foods production decreases[ref]

Water Scarcity

In other parts of the world, they are experiencing water scarcity because of climate change. The world’s food production is decreasing, and as food becomes increasingly scarce more people are dying of hunger. In some areas, drought affects the planting season, leading to famine. Scientists predict that by the late 21st century, droughts would become more common and more intense. In other places, extreme rain or snowfall causes farms to become waterlogged and unproductive. This affects developing countries the most because they lack the technology to make such events as flooding remotely manageable.

#25 - Climate change influences some diseases, for example, malaria, which kills over 400,000 people yearly[ref]

Between 2030-2050 Researchers Predict:

#26 - 38,000 additional annual deaths due to heat exposure in older adults[ref]

#27 - 48,000 additional annual deaths due to diarrhea[ref]

#28 - 95,000 additional annual deaths due to childhood undernutrition[ref]

#29 - 60,000 additional annual deaths due to malaria[ref]

People all over the world will feel the effects of climate change as shown by these climate change facts, but some more than others. People who live in developing countries, coastal regions, megacities, and mountain areas face a higher risk. Those who live on islands or coastal areas are in danger of being displaced by rising sea levels. About 84 fast-growing cities around the world are under threat from rising temperatures and extreme weather events. In Africa, the fastest-growing cities are the most vulnerable.

Climate Projections

Climate Changing Banner
Photo by Markus Spiske from Pexels

#30 - Researchers expect sea levels to rise 1-8 feet by 2100[ref]

Scientists predict that if we do nothing to fix climate change, the global temperature may rise by 3-5 degrees Celsius by 2100. According to the Intergovernmental Panel on Climate Change, if we fail to stop global warming, there could be unfavorable changes. Such as sea-level rise, low agricultural yield, and so on.

#31 - The Arctic ocean is expected to become ice-free by 205011

Global warming has made the arctic sea ice shrink in recent years. It got to its lowest point yet, in 2012. The climate change facts show the ice in the arctic ocean may be gone by the summer of 2050.   The melting ice sheets in the arctic is contributing to sea-level rise. The intergovernmental panel on climate change says published evidence are strong indications of the severity of climate change. They believe that the damaging effects of climate change are likely to increase over time.

Rising Temperatures

#32 - In Syria, they predict the mean annual temperature to increase by 2 degrees Celsius by 2050[ref]

#33 - In Syria, they expect the yearly mean precipitation to decrease by 11% by 2050[ref]

#34 - In the United States, they forecast the mean annual temperature to rise by 2.51°C in 2040-2059[ref]

China and the United States are responsible for the highest greenhouse gas emissions. Together they account for over 40% of emissions. These countries need to play a leading role in global efforts to control climate change.

#35 - In the United States, they predict the annual precipitation to rise by 48.90mm in 2040-2059[ref]

If we immediately stopped greenhouse gas emissions, global warming would not stop for decades or maybe even centuries. Carbon dioxide, the major heat-trapping gas, stays active in the atmosphere for hundreds of years. So, even if we take major actions now, it will be a long time before we see visible results. However, if we do nothing, as these climate change facts show scientists predict that global temperature will continue to rise.

The approach to dealing with climate change is in two stages. The first is reducing greenhouse gas emissions, and the second is adapting to the changes already in place. A two-step solution seems easy enough, but climate change is a complex problem. Solving it will have effects on the economic and social culture of countries all over the world. The climate change facts show clearly that we can not afford to turn a blind eye to what we need to do now to prevent more harm to our future environment, lifestyle, and even survival.

2 Le Treut, H., R. Somerville, U. Cubasch, Y. Ding, C. Mauritzen, A. Mokssit, T. Peterson and M. Prather. (2007). Historical Overview of Climate Change. In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M. Tignor and H.L. Miller (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA
3 Gaffney O, Steffen W. The Anthropocene equation. The Anthropocene Review. 2017;4(1):53-61. doi:10.1177/2053019616688022
5 Parncutt R. (2019). The Human Cost of Anthropogenic Global Warming: Semi-Quantitative Prediction and the 1,000-Tonne Rule. Frontiers in psychology, 10, 2323. https://doi.org/10.3389/fpsyg.2019.02323
6 Robine, J. M., Cheung, S. L., Le Roy, S., Van Oyen, H., Griffiths, C., Michel, J. P., & Herrmann, F. R. (2008). Death toll exceeded 70,000 in Europe during the summer of 2003. Comptes rendus biologies, 331(2), 171–178. https://doi.org/10.1016/j.crvi.2007.12.001
8 Nerem, R., Beckley, B., Fasullo, J., Hamilton, B., Masters, D., Mitchum, G. (2018). Climate-change–driven accelerated sea-level rise. https://doi.org/10.1073/pnas.1717312115
9 Sabine, C. et. al. (2004). The Oceanic Sink for Anthropogenic CO2
10 UN The Ocean Conference (2017). People and Oceans (fact sheet)
11 Community, SIMIP (2020). Arctic sea ice in CMIP6. Geophysical Research Letters, 47, e2019GL086749. https://doi.org/10.1029/2019GL086749
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