Determine the Value Of $a$ , So That the Line $(a+2) x+\left(a^{2}-a\right) y+3 a^{2}-8 a+5=0$

Determine the value of $a$ , so that the line $(a+2) x+\left(a^{2}-a\right) y+3 a^{2}-8 a+5=0$ is parallel to the $y$ -axis.