Too small? Idk if it's too broad of an answer but that's what I've been told
Probably because any activities related to environment protection require a change of mentality and habits and participation of everyone in order to be fruitful.
The confederate army began to falter and eventually lose the battle at Petesburg, Virginia due to the absence of any replacement troops.
The army had no replacement troops which eventually lead to their falter and loss of battle.<span />