Here are some opportunities to help get rid of the litter that clogs our streams and pollutes our parks in Fairfax County: Alice Ferguson Foundation has its 29th Annual Potomac River Watershed Cleanup on Saturday, April 8. For more information go to http://fergusonfoundation.org/trash-free-potomac-watershed-initiative/potomac-river-watershed-cleanup/ Stream Cleanup at Old Lee Highway Bridge Saturday, April