If we convert the 'kinetic energy' (which is to say, the momentum) of the earth into joules, we arrive at a figure of

2,652,664,284,000,000,000,000,000,000,000,000 joules

If we assume that 'space' is an energy field and that it is this energy field (manifesting as a warped space field as we percieve things) therefore encapsulates this quantity of energy.

If we assume that most of the field energy is clustered closest to the center of the field, then my rough calculations indicate that one cubic meter of three dimensional space encapsulates about 2 trillion joules (based upon a sphere with a volume encapsulating about 1.28E21 cubic meters).

The entire world is projected to require 562 quadrillion BTU (5.9E20 joules) by 2015. Working with this figure we find that it would take four and one half trillion years to deplete all of the energy encapsulated in the earth's warped space field. If we assume that humans increased their energy usage by ten times, and never recycled energy (energy can never be destroyed, only transferred) then it would take about 400 billion years to deplete the field.

Upon consideration of this matter it becomes obvious that the environmental impact of this technology is negligible and that it therefore represents a vast improvement over the harmful energy technologies (based upon burning up matter) that exist today.