Factors in Population Growth The key factors in population change are natural increase (the number of births minus the number of deaths), net migration, and the interplay between these elements. These factors are in turn driven by fertility rates, the age structure of the population, mortality rates, life expectancy, and rates of in- and out-migration.
Federal law requires that before signing a lease for housing built before 1978, renters must receive the following from your landlord: An EPA-approved information pamphlet on identifying and controlling lead-based paint hazards, Protect Your Family From Lead In Your Home (PDF).
The U.S. Environmental Protection Agency (EPA) first issued the rule in 1991 pursuant to the Safe Drinking Water Act. EPA promulgated the regulations following studies that concluded that copper and lead have an adverse effect on individuals.lthough lead is a known poison, the mechanical and chemical characteristics of the metal continue to keep lead as an important component in many products. In water supply, lead's durability and workability selected it for use as water pipes. Lead alloys (bronze, brass) are used for plumbing fittings.