Seven school districts in the state of Ohio have put policies in place that reduce the time diesel school buses idle while waiting for children. The toxins produced from the diesel engines can be harmful to children who are waiting to load the buses. The policies include “no idle” signs, the installation of engine filters, switching to cleaner fuels, and beginning idle-reduction policies. Many school districts in Ohio have also started or are considering biodiesel as a way to reduce the polutants while listening to the advocates for childrens health. The lowest cost solution is to implement idle-reduction policies although resistance to uncomfortable buses may be a problem in cold weather.