The Allegheny County Health Department has teamed up with local partners through the CDC-funded Racial and Ethnic Approaches to Community Health (REACH) grant to address health disparities within identified priority communities. The coalition aims to improve health, prevent chronic diseases, and reduce health disparities among residents with the highest risk, or burden, of chronic disease. The communities that our partners are currently prioritizing include Clairton, Duquesne, McKeesport, North Braddock, North Versailles, Rankin, and Wilkinsburg and the neighborhoods of the Northside, Homewood/Larimer, the Hill District, Garfield, Hazelwood, West End, and the Hilltop in the City of Pittsburgh.This is an Allegheny County extract of the 2020 US Census Tracts downloaded from the following website: https://www.census.gov/geographies/mapping-files/time-series/geo/tiger-geodatabase-file.htmlCategory: HealthOrganization: Allegheny County Department: Health DepartmentTemporal Coverage: currentData Notes: Coordinate System: GCS_North_American_1983Development Notes: The American Community Survey (ACS) 2017-2021 5-year Poverty Data (S1701) was used to determine what census tracts in Allegheny County had 20% of the total population living below 100% of the federal poverty level (FPL). Using a 3-step custom sort the census tracts were ranked to determine the census tracts with the highest number and percent of black residents living below the FPL. The previous grant cycle (2018) focused on 6 regions that fit this criteria and 3 additional regions were added in 2023. Neighborhoods with a high student population were excluded from the final list of census tracts including Oakland, Bluff, Southside Flats, and Southside Slopes. Related Document(s): REACH – Live Well AlleghenyAbout REACH | REACH | CDCFrequency - Data Change: As neededFrequency - Publishing: As neededData Steward Name: Samantha ScottData Steward Email: samantha.scott@alleghenycounty.us

The world's population first reached one billion people in 1805, and reached eight billion in 2022, and will peak at almost 10.2 billion by the end of the century. Although it took thousands of years to reach one billion people, it did so at the beginning of a phenomenon known as the demographic transition; from this point onwards, population growth has skyrocketed, and since the 1960s the population has increased by one billion people every 12 to 15 years. The demographic transition sees a sharp drop in mortality due to factors such as vaccination, sanitation, and improved food supply; the population boom that follows is due to increased survival rates among children and higher life expectancy among the general population; and fertility then drops in response to this population growth. Regional differences The demographic transition is a global phenomenon, but it has taken place at different times across the world. The industrialized countries of Europe and North America were the first to go through this process, followed by some states in the Western Pacific. Latin America's population then began growing at the turn of the 20th century, but the most significant period of global population growth occurred as Asia progressed in the late-1900s. As of the early 21st century, almost two-thirds of the world's population lives in Asia, although this is set to change significantly in the coming decades. Future growth The growth of Africa's population, particularly in Sub-Saharan Africa, will have the largest impact on global demographics in this century. From 2000 to 2100, it is expected that Africa's population will have increased by a factor of almost five. It overtook Europe in size in the late 1990s, and overtook the Americas a few years later. In contrast to Africa, Europe's population is now in decline, as birth rates are consistently below death rates in many countries, especially in the south and east, resulting in natural population decline. Similarly, the population of the Americas and Asia are expected to go into decline in the second half of this century, and only Oceania's population will still be growing alongside Africa. By 2100, the world's population will have over three billion more than today, with the vast majority of this concentrated in Africa. Demographers predict that climate change is exacerbating many of the challenges that currently hinder progress in Africa, such as political and food instability; if Africa's transition is prolonged, then it may result in further population growth that would place a strain on the region's resources, however, curbing this growth earlier would alleviate some of the pressure created by climate change.

Estimated number of persons by quarter of a year and by year, Canada, provinces and territories.