Cu63,Cl35, andH1NMR in theS=12Kagome LatticeZnCu3(OH)6Cl2

${\mathrm{ZnCu}}_3(\mathrm{OH}{)}_6{\mathrm{Cl}}_2$ ($S=\frac{1}{2}$) is a promising new candidate for an ideal Kagome Heisenberg antiferromagnet, because there is no magnetic phase transition down to $\sim 50\mathrm{mK}$. We investigated its local magnetic and lattice environments with NMR techniques. We demonstrate that the intrinsic local spin susceptibility decreases toward $T=0$, but that slow freezing of the lattice near $\sim 50\mathrm{K}$, presumably associated with OH bonds, contributes to a large increase of local spin susceptibility and its distribution. Spin dynamics near $T=0$ obey a power-law behavior in high magnetic fields.