world population; global population
Refers to the total number of people living on Earth. Often used in demographic, economic, and environmental contexts.
The world population has exceeded 8 billion.
The growth of the world population is causing food problems.
人口 means 'population' in general, while 世界人口 specifically refers to the population of the entire world.
Compound of 世界 (world) and 人口 (population).