Ecological footprint: definition, meaning and calculator
Ecological Footprint Calculator
Easy Eco Tips - Use the carbon footprint calculator to find out about your habits and what you could improve to be more eco-friendly. You can answer many detailed questions about what
Your ecological footprint: how to calculate it and why it matters
Calculating humanity's Ecological Footprint | WWF India
Assessing the Ecological Footprint and biocapacity of Portuguese cities: Critical results for environmental awareness and local management - ScienceDirect