Even the grainy black and white footage in defunct four by three ratio shows clearly enough that there was no sea of green grass on the satellite's surface when the astronaut took his first steps. The seeds of the all-encompassing lawn we see today were sown by his organisation three quarters of a century later to make their final mark on history. As a last act N.A.S.A coloured the moon green so their legacy could be seen by anyone who ever looked skyward at night. The effort was also the first and to date the most successful example of terraforming.
You might one day be lucky enough to stand on the green turf of the moon and look down upon the glimmering blue orb of Earth and if you do just think about how long Earth has looked as it does compared to how long there has been grass on the moon.