
463Climate Engineering: Impact Reducer or Suffering Inducer?
of using agricultural waste to make and then bury biochar versus
using the agricultural waste to displace use of fossil fuels?
2. To signicantly reduce the problem of forward scattering by sulfate
aerosols injected into the stratosphere, Dr. Edward Teller (Teller
etal. 1997, 2002) proposed instead using particles or balloons dim-
pled with corner reectors that would backscatter incident radiation.
Assuming hydrogen-lled Mylar balloons of 1-m diameter oating
freely in the stratosphere, how many balloons would be needed
to counterbalance the radiative trapping of a CO
2
doubling