From grimoire
Calculates personal or organizational ecological footprint in global hectares using Global Footprint Network methodology. Pinpoints highest-impact categories (e.g., food, transport) for targeted reduction.
How this skill is triggered — by the user, by Claude, or both
Slash command
/grimoire:calculate-ecological-footprintThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
Calculate personal or organizational ecological footprint in global hectares using the Global Footprint Network methodology to quantify the land and sea area required to sustain consumption and absorb waste, then prioritize the highest-impact categories for reduction.
Calculate personal or organizational ecological footprint in global hectares using the Global Footprint Network methodology to quantify the land and sea area required to sustain consumption and absorb waste, then prioritize the highest-impact categories for reduction.
Adopted by: Global Footprint Network (established 2003) developed the ecological footprint methodology, now used by over 70 national governments and adopted as a sustainability metric by WWF Living Planet Report, UNEP, and IUCN. Earth Overshoot Day (calculated annually by GFN) uses this methodology to determine when humanity has used more from nature than Earth can renew in one year. The EU and multiple national sustainability strategies reference ecological footprint data. Impact: Carbon footprint alone (CO2 equivalent) captures only one dimension of environmental impact. Ecological footprint accounts for carbon, food, land use, water, timber, and fishing — expressing all in a common unit (global hectares, gha). This enables cross-category comparison: for most individuals in high-income countries, food and transport together represent 60–70% of the total footprint, making targeted reduction far more effective than small changes spread across all categories.
Global hectare (gha): a standardized unit representing 1 hectare of biologically productive land or sea at world-average productivity.
The ratio between footprint and biocapacity shows the degree of overshoot.
Global Footprint Network uses six components:
| Category | What it measures |
|---|---|
| Carbon footprint | Land needed to absorb CO2 from fossil fuel burning and land use change |
| Cropland footprint | Agricultural land needed to grow food and fiber consumed |
| Grazing footprint | Pasture land for livestock |
| Forest footprint | Timber and fiber from forests |
| Fishing grounds | Aquatic habitat needed to sustain seafood |
| Built-up land | Infrastructure and settlements |
For personal calculation, primary data categories are:
For personal footprint: use the Global Footprint Network's Footprint Calculator (footprintcalculator.org) or WWF Footprint Calculator. These tools apply:
For organizational/institutional footprint:
After calculating total footprint, rank contribution by category:
Typical high-income country breakdown:
High-impact individual actions:
Target: reduce personal footprint toward the fair Earth share (~1.56 gha), or at minimum reduce by 50% from current level by 2030 (aligned with Paris Agreement 1.5°C pathway).
Track annually: recalculate each year with the same methodology to measure trend.
For organizations: set science-based targets (SBTi framework) and publish footprint reduction plans with annual progress reports.
Ecological footprint has known limitations:
Use in conjunction with: water footprint assessment, biodiversity impact assessment, and LCA for production-side analysis.
npx claudepluginhub jeffreytse/grimoire --plugin grimoireQuantifies greenhouse gas emissions across all scopes using GHG Protocol methodology to establish an auditable baseline for regulatory or voluntary reporting.
Assists with GHG Protocol corporate carbon accounting, including Scope 1/2/3 calculations, boundary setting, emission factors, SBTi targets, and data quality checks.
Applies ecological thinking to systems with interdependencies, limits, and change over time. Routes to the right ecology analysis tool (carrying-capacity, keystone-species, interdependence, succession) based on the situation.