The correct answer is - lumber.
The lumber is both renewable and inexpensive resource, and it also can be found in every continent, apart from Antarctica. Still, the usage of lumber has to be managed carefully and with nice planning, because so far, the usage of lumber is surpassing the trees being planted to replace them, and that led to the total destruction of lots of forests throughout the world. This is a very easy thing to do, so the authorities have to force the companies in this industry to replant the areas from where the trees are cut, thus to have a proper usage of it, stable reserves, and protect the environment.
Senators serve terms of six years each; the terms are staggered so that approximately one-third of the seats are up for election every two years.
Voting system: Varies in 5 States; Plurality voti...
Length of term: 6 years
The chief executive is part of the legislative branch
