I'd use the library, the encyclopedia and the Internet.
Its E= it can be damage to the ozone layer. Hope this helped you out ;)
Mendel's law of segregation.
The growth rate of Earth is decreasing, as the birth rate is the main source. The death rate is mostly abortion which tyes in with birth rate. Much types of emigration have been seen. Mostly Asians, because most asian countries only want the boys and not the girls. Trump is thinking of making a wall to stop mexican immigration.
