Preservation of Sources and Global Environment

Vocabulary flashcards covering preservation of natural resources, renewable energy sources, and protection of the ozone layer.

Natural Resources

Essential elements such as plants, soil, sunlight, water, wildlife, fossil fuels, and minerals that people rely on daily for food, shelter, and energy creation.

Non-renewable Energy Resources

Limited energy resources—such as oil, gas, coal, and metals—that cannot be replaced once overused.

Renewable Natural Resources

Naturally replenished resources—such as sunlight, air, water, and plants—that require protection to maintain ecosystem balance.

Reduce, Reuse, and Recycle

A practice aimed at minimizing pollution by finding multiple uses for items and reducing overall waste generated.

Planting Trees

An effective strategy for reducing global warming, as trees absorb carbon dioxide, which comprises $82\%$ of greenhouse gases.

Hydroelectric Power

Electricity generated from the rapid flow of water, typically using a dam to store river water in a reservoir.

Solar Energy

Energy captured from the sun using solar panels, which convert sunlight into electricity for immediate use or storage in batteries.

Wind Energy

Electricity produced from moving air using large windmills known as wind turbines.

Alternative Resources

Cheap, durable, and pollution-free energy options—such as hydroelectric power, wind energy, and solar energy—used as substitutes for fossil fuels.

Ozone Layer

A protective atmospheric region located roughly between $15\,km$ and $35\,km$ above Earth's surface that shields against harmful ultraviolet radiation from the Sun.

Ozone Depletion

The breakdown of the ozone layer caused by harmful compounds like Chlorofluorocarbons (CFCs) from appliances, along with oxides of nitrogen and sulphur.

Ozone Hole

A region of severe ozone layer depletion, first discovered in $1985$ over Antarctica.

Ground-Level Ozone

Dangerous ozone formed in the troposphere when pollution combines with heat and sunlight.