BPSC (Balochistan Public Service Commission) · BPSC – Lecturer / Assistant Professor Biology
Geography · General Knowledge
Brazil is the largest country in South America, occupying nearly half of the continent's landmass.
The Middle East region, particularly Saudi Arabia, Iran, Iraq, and Kuwait, holds the largest proportion of the world's proven oil reserves, far exceeding any other region.
The demographic transition model describes the movement of a population from high fertility and high mortality to low fertility and low mortality as a country develops from a pre-industrial to an industrialized economic system.
The United States holds the largest gross external public debt in the world, often cited as a percentage of its GDP, though the total nominal value is the highest.
Approximately $60\%$ of the Amazon rainforest's total area is contained within the borders of Brazil.
Christianity is the world's largest religion, with over $2.4$ billion followers. Islam is the second largest, and due to higher growth rates, is projected to surpass Christianity later this century.
The global replacement rate is approximately $2.1$ children per woman. This slight margin above $2.0$ accounts for children who do not survive to adulthood and the natural imbalance of sexes at birth.
The global population reached approximately **8.2 billion** people in 2024, continuing its growth trajectory, although the annual growth rate has slowed down over the past decades. The 7 billion mark was crossed around 2011.
The **Gini Coefficient** is the most widely accepted measure of income inequality. It ranges from 0 (perfect equality) to 1 (or 100 in percentage terms, representing perfect inequality where one person holds all the income/wealth). The CPI measures inflation, and the HDI measures overall development.
The **United States** maintains its position as the world's largest economy by nominal GDP (approximately $25.43 trillion as of 2024 estimates), followed by China in second place. GDP is the total monetary value of all finished goods and services made within a country during a specific period.
The UN established **17 Sustainable Development Goals (SDGs)**, which are a collection of interlinked global goals designed to achieve a more sustainable and equitable future for all by the year 2030. These goals cover areas from poverty and health to climate change and peace.
The worldwide average life expectancy at birth for the total population stands at approximately **73 years** (with some variations by source and exact year, often quoted as 73.3 years in 2024). This figure is significantly higher than a century ago, reflecting advances in global health.
**South Korea** consistently registers the world's lowest Total Fertility Rate (TFR), with the rate dropping below 1.0 and, in recent years, even below 0.8 children per woman, raising severe demographic concerns about an aging population.
**Macau** holds the title of the most densely populated territory globally, with over 20,000 people per square kilometer. While Bangladesh is often cited for its high density among large nations, Macau's concentration is far greater.
The global literacy rate for people aged 15 and older is approximately **86.3%**. Despite this high average, significant disparities exist, particularly between developed and least developed countries and between genders.
The **Human Development Index (HDI)** is a standard measure of well-being, comprised of only three core dimensions: life expectancy, education (years of schooling), and gross national income (GNI) per capita. Access to clean water, while important, is not a direct component of the main HDI formula.
The **Tokyo-Yokohama** area in Japan consistently ranks as the world's largest urban agglomeration by population, often measured well over 37 million people. Urban agglomeration includes the city proper and surrounding suburban areas.
**Asia** is, by far, the most populous continent, accounting for over 60% of the world's population, primarily due to the large populations of China and India, which are the world's first and second most populous countries.
The world population growth rate has significantly slowed and is now **below 1.0%** annually (around 0.87% in 2024). This slowing rate is primarily due to declining fertility rates in most regions.
**China** has been the world's largest exporter of goods for many years, driving its massive manufacturing economy and global supply chain dominance. The United States is generally the largest importer.