By Steve Graham, Networx

Concrete is perhaps the most common construction material in the world. The US Geological Survey calculated global cement production at more than two billion metric tons per year, and a majority of that cement is used in concrete.

Most concrete production is not inherently eco-friendly. Environmental Building News magazine notes that the annual US carbon dioxide output from cement production equals the carbon dioxide emissions from 22 million cars. Some of the chemical binders and additives used in concrete are also environmentally hazardous.

However, concrete is a great insulator, and it can be produced in a variety of more sustainable ways. There are also many construction options that cut the amount of concrete needed for a project. Here are some specific ways to make the production and use of concrete more sustainable and environmentally sound.