  We consider sigma-terms in $\pi\pi$, $\pi N$ and $K N$ scattering. While the
state of the art in $\pi\pi$ is in principle crystal clear, the kaon-nucleon
case is largely unexplored. The pion-nucleon system is in-between. We propose a
list of topics to be investigated in kaon-nucleon scattering, in order to make
optimal use of the precision data expected from DEAR.
