Why was Lincoln giving the Gettysburg address ?

On November 19, 1863, President Abraham Lincoln delivered a short speech at the end of the ceremonies dedicating the battlefield cemetery at Gettysburg, Pennsylvania. ... In it, Lincoln paid tribute to the Union soldiers who sacrificed their lives for union and equality.

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.

it's no easy i swear it's hard