Carbon dioxide emissions are the number one contributor to increasing greenhouse gas emissions. Maybe you feel this argument is old and stale (like the potential effect on our air), but if you own a Risograph, then you are already addressing the quickly approaching due date on our latest emission-reduction deadline.
The United States, as well as the larger global community, continues to fight for a reduction in carbon dioxide emissions. We continue to make promises based on the idea that our businesses, government agencies and residences can make little fixes - actions like changing your lightbulbs, air drying your clothes, using less paper towels, etc. to make a dent in the promised reductions. (The City of Chicago, specifically, is working on a 25% reduction in their current usage by 2020.  )
The problem is, we're not exactly sure how much these types of changes will make an overall impact. With the help of the Energy Star program, we have a great way to gather resources, assess current equipment and learn about available eco-friendly alternatives. With sources like these, we can make more educated purchases. Currently, the average Risograph uses 10x less energy than the standard required to be granted certification.
Today, companies can go green by using recycled paper, as well as other materials, to pitch in. Our devices are rated to use less energy than a hair dryer. So an office, school or government building could eliminate additional emissions by staffing Risographs as their printing, copying and scanning system. With Riso, there are no toner particles or volatile organic compounds that enter into the atmosphere. While operating, a Riso releases 0 carbon emissions. Sometimes its the little things that can add up to a big impact. We're hoping to continue to learn more about this issue and related resources and events throughout Chicago.
 Climate Change and Chicago. (2010) http://www.chicagoclimateaction.org/pages/climate_change_101/25.php
 (2015) Riso's 2015 environmental sustainability report Shiba, Minato-ku, Toyko, Japan.