Denny, that book series might be a bit dry for family perusal, more appropriate for your girls academic situation .... but I'll agree that population size and growth is an increasing problem - particularly in terms of food cost and distribution

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot