carbon-negative cement production facility

After starting his own farm in Missouri, Marcin Jakubowski quickly discovered it's an expensive business. The tools he needed to start and maintain a sustainable farm didn't exist, so he set out to design them himself. Marcin published a collection of his open source designs, called the Global Village Construction Set, to the Open Source Ecology wiki. Soon, just as in open source software, others from around the world began to collaborate with him in designing these new machines. According to the wiki, "Global Village Construction Set is a modular, DIY, low-cost, high-performance platform that enables fabrication of the 50 different industrial machines that it takes to build a small, sustainable civilization with modern comforts...