  We prove a structural result about the space of one cycles of a separably
rationally connected variety or a separably rationally connected fibration over
a curve, either as a topological group or as an h-sheaf. This has the following
consequences: a proof that the strong coniveau filtration agrees with the
coniveau filtration on degree 3 homology, and a result on the integral Tate
conjecture for homologically trivial one cycles.
