Sheryl Crow urges us all to save the world by using one sheet of toilet paper per bathroom visit. Whilst I’m sure her heart is in the right place, her advice is crap (which would take a lot more than one sheet of toilet roll to clear up.)  
In her rock star world, I’m sure that one sheet of 15 ply, double quilted, extra velvet tissue roll does indeed suffice. I, however, am a poor student, with the meagre offerings of the 99p store flapping uselessly in my bathroom. Honestly, just breathing in my toilet tissue’s direction causes it to disintegrate immediately. I would be in trouble if dictated to use just one sheet. 
There are plenty of small things we can all do to combat global warming, but it’s unlikely that Ms Crow’s suggestion will be widely adopted. Thank goodness for that.