I was pondering over my career choices earlier. If I could have the use of a time machine I would use it to travel back to secondary school - and this time I would work really, really hard.
I’d focus on maths, science and biology , with the aim becoming biological engineer. I would then put all my aquired intellectual focus on the invention of a strain of grass that never grows longer than an inch. Nobody would have to cut the grass, or maintain their lawn ever again.
P.S All my grass is dead. I don’t know what to do about it.