noun
world population; global population
Refers to the total number of people living on Earth. Often used in demographic, economic, and environmental contexts.
世界人口は80億人を超えた。
The world population has exceeded 8 billion.
世界人口の増加が食料問題を引き起こしている。
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).