I dont know how old Eli is but here are some
ride a bike instead of driving a car
plant trees
slow down on use of water/electricity
Answer:
It's B - How much water is used to produce one paper bag?
Answer:
D, think of chemical changes. When iron rusts it is chemically changed. The other answers are a change in form or a property of iron.
It would takes around 175 hours to walk 700 miles.