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Concrete is the most widely-used construction material with over ten billion tons produced annually. About 7% of global CO2 emissions come from concrete production. The primary source of these emissions generated by concrete manufacturing is Portland cement, responsible for about 77% of total CO2 emissions. Now a sustainable substitute for concrete is being developed by civil engineer Dr. John Forth from the School of Engineering, University of Leeds, in the UK.
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| Recycling old shipping containers is both a green and affordable solution to housing crisis. The dry freight container, a standard used for transport over water, was introduced in 1956. The unit is used extensively for long distance hauling of goods over water. Trains and trucks can also easily transport merchandise using these metal boxes.
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| Construction and demolition (C&D) materials account for almost 22 percent of the waste stream. Many of these materials can be reused or recycled, thus prolonging our supply of natural resources and potentially saving money in the process. Common C&D materials include lumber, drywall, metals, masonry (brick, concrete, etc.), carpet, plastic, pipe, rocks, dirt, paper, cardboard, or green waste related to land development. Of these, metals are the most commonly recycled material while lumber makes up the majority of debris that still goes to a landfill.
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| For hundreds of years, people have used garbage dumps to get rid of their trash. Today, we still bury our wastes, although not in the open dumps of yesterday. About 55 percent of our garbage is hauled off in trucks and packed into sanitary landfills—making it America’s number one way of getting rid of its trash. The other 45 percent is either recycled or burned.
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