1.7 Summary
Key Points
- A natural resource is any material or energy form from Nature that humans can use to meet a need or want, air, water, soil, minerals, forests, sunlight, wind.
- Something becomes a resource only when three conditions hold together: it is technologically accessible, economically feasible, and culturally/legally acceptable. So “resources are not, they become”, human knowledge and need create them.
- Resources can be classified three ways at once: by use (essential / material / energy), by origin (biotic / abiotic), and by renewability (renewable / non-renewable).
- Renewable resources (sun, wind, water, forests) can be replaced naturally if not overused; non-renewable resources (coal, oil, gas, minerals) take millions of years to form and are effectively finite. Renewable does not mean unlimited.
- Resources are unevenly distributed across the Earth because of geological history, climate, topography and ecological conditions. This drives trade between regions, and sometimes conflict over scarce resources like water.
- Ecosystem services are the free benefits of healthy natural systems: the three star examples are pollination, water purification and climate regulation. They fall into four families, provisioning, regulating, supporting and cultural, and are costly or impossible to replace once lost.
- Sustainable use means meeting present needs without harming future generations. The Punjab groundwater crisis is a warning about over-exploiting a renewable resource; Sikkim’s organic farming is a hopeful example of conservation that also raised incomes; cement shows how careless production of one resource can pollute others.
- Everyday sustainability rests on the three Rs, Reduce, Reuse, Recycle (and Refuse), plus conserving water and energy, protecting ecosystems, and shifting to renewable energy.
One Sentence to Remember Nature’s gifts become resources through human ingenuity, are spread unevenly, serve us for free through ecosystems, and last only if we use them sustainably, meeting today’s needs without robbing tomorrow’s.