If a certain environment bill is passed by Congress, the United States would have to reduce greenhouse gas emissions by 17% from 2005 levels by the year 2020. The University of New Hampshire has been at the forefront of reducing emissions, and if this bill is passed they would be required to have a greenhouse gas emission level of about 56,440 MTCDE (metric tons carbon dioxide equivalents) by 2020. Find their approximate emission level in 2005.