Conservation means protecting and preserving something valuable so it doesn't get used up, damaged, or lost. When we talk about conservation of natural resources, we mean using things like water, forests, and wildlife carefully so they'll still be available for future generations. A park ranger practices conservation by protecting endangered species and their habitats.

You can conserve many different things: energy (by turning off lights when you leave a room), water (by taking shorter showers), or even your own strength (by pacing yourself during a long hike instead of sprinting at the start).

Conservation is different from simply not using something at all. It means being thoughtful and deliberate about how you use limited resources. A conservationist is someone dedicated to protecting nature and wildlife. When a community builds a nature preserve or creates rules about fishing limits, they're practicing conservation, making sure today's actions don't ruin tomorrow's possibilities.

In science, conservation has a special meaning too. The conservation of energy is a fundamental law stating that energy can't be created or destroyed, only transformed from one form to another.