If we continue to consume energy at the current rates and do little to change where we get the energy from, it is estimated that these limited sources will be depleted in as soon as 50 years. Worse yet, this burning of fossil fuels for energy produces “80% of all human-caused carbon dioxide emissions” (Enger 197). Wind-energy provides a slice of hope towards shifting energy dependency away from non-renewable resources. By looking to wind energy to meet some of our needs, less coal, oil, and natural gas is needed. Wind energy is a renewable energy source: either continually present or has the ability to be replenished. The amount of total wind-produced energy for the U.S. has increased more than twofold from .03 quadrillion British thermal unit (Btu) in 1995 to .11 quadrillion Btu in 2003 (U.S. Bureau Table 898). Yet less than one percent of the nation’s total energy consumption comes from renewable resources (Enger 197). Of that, only two percent of renewable energy comes from wind. And our energy demands are persistently and dramatically climbing. Electrical energy consumed by the average household increased from 2.48 quadrillion Btu in 1980 to 3.89 quadrillion Btu in 2001 (U.S. Bureau Table 900). That's approximately a 57% increase over 21 years.