  Turbulence dissipation is an important process affecting the energy balance
in molecular clouds, the birth place of stars. Previously, the rate of
turbulence dissipation is often estimated with semi-analytic formulae from
simulation. Recently we developed a data analysis technique called
core-velocity-dispersion (CVD), which, for the first time, provides direct
measurements of the turbulence dissipation rate in Taurus, a star forming
cloud. The thus measured dissipation rate of $(0.45\pm 0.05)\times 10^{33} {\rm
erg\ s^{-1}}$ is similar to those from dimensional analysis and also consistent
with the previous energy injection rate based on molecular outflows and
bubbles.
