Abstract: A method for providing long term carbon sequestration and reducing an individual's personal carbon footprint comprises: growing, harvesting, drying and grinding a plurality of weeds, then pressing the ground weeds into hollow block shells for manufacturing blocks therefrom. The hollow block shells could be made a recycled plastic, a plant based plastic, bamboo, a reclaimed wood fiber, ground up nut shells and/or a fungus material. The method, and the blocks manufactured thereby could conceivably impact total atmospheric carbon dioxide levels as a CO2 Net Negative Emissions (NNE) technology.