Maybe use flash cards for them to understand or look up periodic table on line and show them.
One possible reason for the general tread could be the rise in population and the need to sustain oil production for items and objects dependent upon oil or creation or operation.
It may be sustainable due do the dependence on oil already... Yet could change at any minute due to the use of anything new.
Well, becoming more ecological in nature. Using less plastic and recycling more, getting off of conventional cars, getting more educated about even more techniques.
I hope that may help, if not, just tell me. :D
What’s the question ??????????????????? Explain please ?
