Environmental groups and community activists rallied at the Iowa Capitol to push lawmakers to consider halting the growth of hog farms in the state. Food and Water Watch and Iowa Citizens for Community Improvement sponsored the Thursday event. They have sued the state, claiming it has violated its obligation to protect the Raccoon River from hog farm pollution. Activists at the rally called on lawmakers to consider a House bill introduced last year that would impose a moratorium on hog farm expansion. The bill sponsored by a group of Democrats was not assigned by Republican leaders to a subcommittee for discussion.