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" Find out your water footprint, then pledge to dry it out, joining other nationalgeographic.com users who have already committed to saving thousands of gallons."

"Schools Global Footprint is a teaching resource that helps you to explore and to reduce the environmental effect your school has on the planet. The global footprint calculator is a great tool for helping you reduce your schools' ecological footprint by taking action on six topic areas including: energy, transport, food, waste, water and buildings."

answer questions; do math; instantly get facts, calculators, unit conversions, and real-time quantitative data and statistics; create plots and visualizations; and access vast scientific, technical, chemical, medical, health, business, financial, weather, geographic, dictionary, calendar, reference, and general knowledge-and much more.

answer questions; do math; instantly get facts, calculators, unit conversions, and real-time quantitative data and statistics; create plots and visualizations; and access vast scientific, technical, chemical, medical, health, business, financial, weather, geographic, dictionary, calendar, reference, and general knowledge-and much more.