The three Rs – reduce, reuse, recycle

One of my favourite topics was always recycling (however funny that may sound).  I remember learning about Toronto’s blue bins, what could and couldn’t go in them and why recycling was so important.
Those lessons went hand in hand with those on reducing and reusing.  I really took those messages to heart, to the point that teachers would have to pry tiny pencil stubs from my little fingers to get me to use a new one.  To this day, I’m a compulsive reducer, reuser and recycler.
What environmental lessons do you remember learning in school?