Global warming has become a major issue that are being discussed by scientists and policy makers throughout the world. Global warming occurs due to high content of carbon dioxide (CO2) in the atmosphere which is one of the factors that increase the temperature of the earth. Researcher has developed green technology to reduce the quantity of CO2 by producing brick that used less cement for stabilization. Cement manufacturing has been known to produce high carbon print and reducing the dependence of cement in construction may help the environment. Preliminary investigation has shown that it is possible to replace cement totally using magnesium oxide (MgO) or magnesium carbonate (MgCO3) which has lower carbon print in cement brick production. The resultant bricks are also found to act as CO2 absorber and if widely used, it can have a positive impact on the environment. The main focus of this study is to find out whether MgO and MgCO3 when used as cement replacement has the ability to absorb significant carbon dioxide gaseous in pressed soil-cement brick which is popularly used in third world countries. Three types of tests were carried out namely, carbon dioxide absorption test, water absorption and pH leachate test. About 20 full dimension samples of size 250 mm x 125 mm x 100 mm and 36 half-size samples of size 100 mm x 50 mm x 30 mm were produced throughout these studies. The result of the investigation has shown that MgO and MgCO3 as partial replacement of cement in pressed interlocking soil-cement brick has the ability to absorb substantial CO2 in the environment and therefore can play an important role as a green building material for the future.