(Vancouver, WA)  --  Officials in Vancouver are reminding people to clean up after themselves this Fourth of July.  Fireworks are going on sale in Clark County next week, but there is worry that bits and pieces of the fireworks could get into local creeks, rivers or streams.  Metals, sulfur, nitrates, paper and plastic used in fireworks aren't good for fish or area waterways.  Clark County has limits on setting off fireworks and has a chart on the county website to show how people can use fireworks safely and legally.