In the previous section, we reviewed theoretical works that attempted to explain resonant suppression of chemical reactivity. Importantly, some of the theoretical works suggest that the cavity plays a role in effectively modifying environmental friction. The works that used GH theory showed that the effective increase in environmental friction led to the suppression of chemical reactivity. The same argument can also be used to show that cavity modification to environmental friction leads to an enhancement of chemical reactivity if the solvent friction is much weaker in the energy diffusion-limited regime. To understand this, consider again a model molecular system described by a double well potential such as in the inset of Fig. . The chemical reaction rate as a function of environmental reorganization energy (proportional to environmental friction) is computed using the classical treatment for all degrees of freedom. The reorganization energy Λ of a solvent is directly com-puted from the solvent spectral density J(ω) (see below Eq. 193)