Carbon dioxide, CO2, is well known as the most significant contributor to the greenhouse effect. The greenhouse effect increases proportionally with the carbon dioxide concentration. As the concentration of CO2 in the atmosphere became very high, humanity is threatened by global warming, causing catastrophic damage due to more and more frequent extreme weather phenomena. Some of the possible solutions to this leading global concern are reducing energy consumption, encouraging the production/consumption of ecologically more acceptable energy sources, and just as important, but less media-prominent one: carbon sequestration. Carbon sequestration refers to the long-term storage of CO2 underground, either biotic or abiotic. CO2 storage is preceded by the capture and purification or processing if necessary. The concept of sequestration is being mentioned more and more in the realm of geoengineering. Geoengineering also includes the DAC (Direct Air Capture) method. The DAC method refers to the direct capture of carbon dioxide from the air using a sorbent. The captured CO2 can be stored or reused. The method of direct air capture is also the basis of artificial trees’ mechanism of action. Artificial trees are passive devices that represent an alternative to natural trees. With the help of a specific sorbent, which – when dry – demonstrates a high affinity for CO2, artificial trees collect CO2 and release it when the sorbent gets wet. Artificial trees have their advantages and disadvantages. Disadvantages are high costs, unpredictability, and a need for a large space area. The advantages are the speed of carbon collection, low energy consumption, and the possibility of sorbent regeneration. In the past few years, carbon dioxide storage technologies have been developed, and projects like this seem to have a bright future, but more support and education of a wider population are needed.