0001193125-08-208910 S-3/A 3 20081010 20081010 ENVIRONMENTAL POWER CORP 0000805012 4991 042782065 DE 1231 S-3/A 33 333-152807 081117550 120 WHITE PLAINS RD SUITE 610 TARRYTOWN NY 10591-5546 914-631-1435 120 WHITE PLAINS RD SUITE 610 TARRYTOWN NY 10591-5546 S-3/A 1 ds3a.htm AMENDMENT NO.3 TO FORM S-3 EX-5.1 2 dex51.htm OPINION OF PIERCE ATWOOD LLP GRAPHIC 4 g92150g99y10.jpg GRAPHIC