This website is a valuable resource for anyone looking to learn more about CO2 and its impact on the environment.

The World of CO₂

Diagram of a carbon dioxide molecule showing one carbon atom bonded to two oxygen atoms, with labels explaining atomic details and bond formation.

It all starts with the CO₂ molecule, which consists of one carbon and two oxygen atoms.

Chart List*
– N° 1 CO₂ - Carbon dioxide molecule
– N° 2 Earth's atmospheric composition
– N° 3 Natural sources of CO₂ emissions
– N° 4 Global anthropogenic CO₂ emissions
– N° 5 The global carbon cycle
– N° 6 Carbon and plant respiration
– N° 7 Plant categories and abundance (C3, C4 & CAM Plants)
– N° 8 Photosynthesis, the C3 vs C4 gap
– N° 9 Plant respiration and CO₂
– N° 10 The logarithmic temperature rise of higher CO₂ levels.
– N° 11 Earth's atmospheric composition in relationship to CO₂
– N° 12 Human respiration and CO2 concentrations
– N° 13 600 million years of temperature change and atmospheric CO₂
– N° 14 The composition of the human body
*Each chart is linked with a download PDF
All 14 charts in one PDF

About The Audio Guides

Each audio guide is designed to accompany its chart and provide a clear, easy-to-understand explanation of the information shown. Together, the charts and audio tracks create a guided learning experience that explores the science of carbon dioxide, plants, and the natural carbon cycle. All the audio guides can be downloaded.

Downloads à la carte
- 📂 PDF zip file download all charts
- 📂 JPG zip file download all charts
- 📂 PNG zip file download all charts

Diagram of a carbon dioxide molecule showing one carbon atom in the center bonded to two oxygen atoms. The carbon atom has six protons, six neutrons, and six electrons, while each oxygen atom has eight protons, eight neutrons, and eight electrons.

Pie chart showing Earth's atmospheric composition with 78% nitrogen, 20% oxygen, 2.5% water vapor, 0.93% argon, 0.04% carbon dioxide, and 1% remaining gases, including data on parts per million for each component.

Pie chart showing the natural sources of CO2 emissions, including ocean exchange, plant and animal respiration, soil respiration, and volcanic eruption, along with their respective percentages and global emissions in billion tons.

Pie chart illustrating global anthropogenic CO2 emissions, showing 64.5% from energy, 13.8% from agriculture, 12.2% from forestry, 4.3% from industry processes, 3.2% from waste, and 2.1% from international bunkers.

An infographic explaining the global carbon cycle, showing that 95.1% of carbon dioxide comes from natural sources like oceans, vegetation, and land, while 4.9% is man-made from fossil fuel consumption, with associated greenhouse gases and their impacts.

An infographic comparing plants with lower and higher atmospheric CO2 levels. The plant with lower CO2 is smaller, has denser stomata, and requires more water, growing slower. The plant with higher CO2 is bigger, has fewer stomata, needs less water, and grows faster.

Infographic about plant categories and absorption of CO2 during photosynthesis. It shows three categories: C3 plants, C4 plants, and CAM plants, with illustrations of wheat, corn, and pineapple respectively. C3 plants are 90% of all plant life, using the Calvin Cycle, including wheat, rye, oats, rice, cotton, sunflower, soybeans, spinach, tomatoes, peanuts, and potatoes. C4 plants are about 5%, utilizing the Hatch-Slack pathway, including maize, sugarcane, sorghum, weeds, and grasses. CAM plants have the remaining plant life, such as pineapple, orchids, bromeliads, cacti, and wetland plants, involved in crassulacean acid metabolism.

An infographic illustrating the photosynthesis efficiency gap between C3 and C4 plants. It compares atmospheric CO2 levels from 1900 and 2019, showing C3 plants are less efficient at lower CO2 levels, while C4 plants are more efficient at current CO2 levels. The graph plots CO2 concentration in ppm against assimilation rate in μmol m⁻² s⁻¹ with curves for C3 and C4 plants, including notes on plant characteristics and climate preferences.

Diagram comparing plant CO2 absorption during the day and CO2 release at night, showing trees absorbing more CO2 during the day with green arrows and releasing less CO2 at night with blue arrows.

Infographic showing the relationship between carbon dioxide levels and global temperature increase. It includes a color scale from 415 ppm to 3200 ppm CO2, indicating temperature rise from present to doubling CO2 levels. A graph plots net downward forcing in watts per square meter versus CO2 concentrations in ppm, with lines representing pre-industrial, present, and twice present CO2 levels. The infographic notes the logarithmic heating effect of CO2 and credits Willis Eschenbach with the graphic from 2006.

Diagram showing Earth's atmospheric composition by volume, including nitrogen, oxygen, argon, and water vapor. Highlights that 4% of greenhouse gases are CO2, with man-made sources contributing 4.9% of CO2. The water vapor represents 95% of greenhouse gases, totaling 25,000 ppm, and CO2 makes up only about 2% of the atmosphere.

Line graph showing atmospheric CO2 levels and average global temperature over the past 600 million years. CO2 levels (blue line) peaked around 700 million years ago and declined, while temperature (red line) remained stable until after 600 million years ago, then fluctuated with notable drops and rises.

Infographic showing the human body with color-coded elements representing element composition: oxygen (blue), carbon (red), hydrogen (yellow), nitrogen (green), calcium (gray), and phosphorus (light green). Text explains that nearly 99% of the human body's mass is made of six elements, with oxygen being the most prevalent, followed by carbon, hydrogen, nitrogen, calcium, and phosphorus.