Human Population
Human & Economy
8.19B est.
Trend & projectionHover to read
3.7B (1970) → 8.19B (2026) · ~9.7B by 2050
Modeled world population estimate from the U.S. Census population clock.
PeopleHomo sapiens
U.S. Census Bureau Jun 2026
Sapiens Scientia · Planetary Vital Signs
The Earth's Vital Signs
A patient is read through their vital signs; so is a planet. These are the measured trends of the one Earth system human civilization is embedded in — each one charted from the 1970s, handed off to a dashed projection toward 2050, and linked back to the body that publishes it.
16 indicators5 domains1970–2050People → the planet
Reading the chart
Each card shows the latest published value, a sparkline of the measured record, and a dashed line extending the trend to mid-century. The solid dot marks where measurement ends and projection begins. Filter by domain, or sort by how far each line has moved across its own record. Every figure links to its primary source.
Projections are simple trend extensions for orientation, not formal forecasts. The same dataset annotates the Earth model on the homepage.
16 indicators shown
Sort
Human & Economy
Macrosystems — the people, economy, and energy that together drive every other line on this page.
Rising
Global Oil Stock
Human & Economy
49% used
Trend & projectionHover to read
10 (1970) → 49 (2025) · ~64 by 2050
Approximate cumulative oil consumed vs. proved reserves remaining; excludes unproved resources.
Fossil FuelsEnergy Generation SystemTransportation, Pipes, & Cables
Worldometer / OilPrice 2025 est.
Global GDP
Human & Economy
$118T
Trend & projectionHover to read
$3.4T (1970) → $118T (2025) · ~$250T by 2050
Nominal world GDP at current prices; not adjusted for purchasing power or inflation.
Economic SystemFinancial SystemBusiness & Industrial System
IMF WEO 2025 est.
Primary Energy Use
Human & Economy
592 EJ
Trend & projectionHover to read
230EJ (1970) → 592EJ (2024) · ~720EJ by 2050
Global primary energy consumption; fossil fuels account for nearly 87% of the total.
Energy Generation SystemFossil FuelsEconomic SystemTechnology
Energy Institute 2024
Atmosphere & Climate
Megasystems — the composition of the air and the climate it forces.
Global Temperature
Atmosphere & Climate
+1.19 C
Trend & projectionHover to read
0.03°C (1970) → 1.19°C (2025) · ~1.85°C by 2050
2025 annual anomaly vs. NASA's 1951-1980 baseline.
AtmosphereClimate System
NASA GISS 2025 annual
Atmospheric CO2
Atmosphere & Climate
431 ppm
Trend & projectionHover to read
325ppm (1970) → 431ppm (2026) · ~495ppm by 2050
Latest monthly Mauna Loa measurement shown by NASA.
AtmosphereClimate SystemFossil Fuels
NASA / NOAA Apr 2026
Atmospheric Methane
Atmosphere & Climate
1,940 ppb
Trend & projectionHover to read
1580ppb (1980) → 1940ppb (2026) · ~2100ppb by 2050
Heat-trapping gas measured from NOAA's global network.
AtmosphereClimate SystemAgricultural Systems
NASA / NOAA Jan 2026
Ocean & Ice
Megasystems — the hydrosphere, from deep-ocean heat to vanishing polar ice.
Ocean Heat
Ocean & Ice
372 +/- 2 ZJ
Trend & projectionHover to read
20ZJ (1970) → 372ZJ (2024) · ~600ZJ by 2050
Upper-ocean heat content change since 1955.
HydrosphereClimate System
NASA / NOAA Dec 2024
Sea Level
Ocean & Ice
+0.08 cm
Trend & projectionHover to read
0cm (1993) → 11.2cm (2025) · ~27cm by 2050
Global mean sea level rise during 2025.
HydrosphereClimate System
NASA JPL 2025
Arctic Sea Ice
Ocean & Ice
-12.2% / decade
Trend & projectionHover to read
7.8 (1980) → 4.2 (2024) · ~1 by 2050
September minimum extent trend vs. the 1981-2010 average.
HydrosphereClimate System
NASA / NSIDC Annual series
Land, Water & Life
Megasystems — soils, freshwater, forests, and the living biosphere.
Freshwater Withdrawals
Land, Water & Life
72% ag.
Trend & projectionHover to read
78% ag (1970) → 72% ag (2024) · ~67% ag by 2050
Share of global freshwater withdrawals used by agriculture.
FreshwaterAgricultural SystemsPeopleEcosystems
UN-Water 2024 report
Land Degradation
Land, Water & Life
up to 40%
Trend & projectionHover to read
20 (2000) → 40 (2025) · ~60 by 2050
Estimated share of the world's land surface degraded by human activity.
Soil SystemAgricultural SystemsEcosystemsBiosphere
United Nations UN estimate
Tropical Primary Forest
Land, Water & Life
6.7M ha lost
Trend & projectionHover to read
3.5M ha (2015) → 6.7M ha (2024) · ~2M ha by 2050
Record tropical primary rainforest loss in 2024.
EcosystemsBiosphereAgricultural Systems
Wildlife Populations
Land, Water & Life
-73%
Trend & projectionHover to read
0% (1970) → -73% (2020) · ~-85% by 2050
Average change in monitored vertebrate populations, 1970-2020.
EcosystemsBiosphereMulticellular Life FormsMammals
WWF / ZSL 2024 report
Waste & Pollution
Anthropogenic waste flowing back into the Earth systems that absorb it.
Municipal Waste
Waste & Pollution
2.1B t/yr
Trend & projectionHover to read
1.2 (2000) → 2.1 (2023) · ~3.8 by 2050
Global municipal solid waste generation, projected to rise to 3.8B tonnes by 2050.
Anthropogenic WasteWaste Management SystemPeopleEconomic System
UNEP 2023
Plastic Waste
Waste & Pollution
353M t/yr
Trend & projectionHover to read
30 (1970) → 353 (2019) · ~800 by 2050
Global plastic waste generated in 2019; plastics production reached 460M tonnes.
Anthropogenic WasteWaste Management SystemBusiness & Industrial System
OECD 2019
Every line sits on the ladder
These indicators are not free-floating statistics. Each one reads a specific rung of the nested-systems hierarchy — the atmosphere, the hydrosphere, the biosphere, the human economy — that Sapiens Scientia is built around.