Energy Conservation
Introduced| English | Meaning |
|---|---|
| Energy conservation/ˈenədʒi ˌkɒnsəˈveɪʃn/ | Energy conservation |
| Efficiency/ɪˈfɪʃənsi/ | The fraction of total energy or power input converted to useful output. |
| Insulation/ˌɪnsjuːˈleɪʃn/ | Insulation |
The energy you never use
- Every unit of energy has a cost — fuel, money, pollution.
- The cheapest, cleanest unit is the one you never have to make.
- Energy conservation 能源节约 means using less to do the same things.
- It is the fastest way to cut pollution and bills.
Efficiency: more from less
- Efficiency 效率 means getting the same result with less energy.
- An LED bulb gives the same light using a fraction of the power.
- An efficient fridge or car does its job on far less fuel.
- Efficiency saves energy without giving anything up.
A solar farm: generating more renewable energy and cutting demand are both energy-conservation strategies
Energy conservation means…
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Energy conservation is cutting waste — using less energy to get the same result.
Conservation: cutting waste
- Insulation 隔热材料 in walls and roofs stops heat leaking out.
- Turning off lights and unplugging idle devices saves power.
- Taking the bus, cycling, or walking cuts transport fuel.
- Small daily habits add up across millions of people.
Saves energy or wastes energy?
Sort each everyday action by whether it saves or wastes energy.
An LED bulb is more energy-efficient than an old bulb because it…
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Efficiency means getting the same job done with less energy — an LED wastes far less as heat.
Adding ____ to walls and roofs keeps heat from leaking out, saving energy.
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Insulation slows heat loss, so a building needs far less energy to stay warm.
Why it matters
- Saved energy needs no fuel and makes no pollution.
- It eases the strain on limited resources.
- It cuts CO2 without building a single new power plant.
- So conservation is a powerful, cheap climate tool.
Building new power stations is cheaper than saving energy.
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False. Energy you never use needs no fuel, plant or pollution control, so conservation is the cheapest ‘source’ of all.
Select all ways to conserve energy.
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Insulation, efficient lighting, and public transport all cut energy use. Leaving appliances on wastes it.
Two related ideas, kept clear: efficiency is a technology fix — a better bulb or engine that does the same job on less energy. Conservation is a behaviour fix — simply using less (switching off, insulating, driving less). You need both, and together they are often cheaper than building new supply.
One cold house, two fixes:
- Efficiency: swap the old boiler and bulbs for modern efficient ones — same warmth and light, much less energy.
- Conservation: add insulation, close the curtains at night, and turn the heat down a little when out.
- Together the family's energy bill and carbon footprint fall sharply, with no new power station needed anywhere.
Energy conservation means using less energy to do the same things — the cheapest, cleanest "source" of all. Efficiency gets the same result with less energy (LED bulbs, efficient engines); conservation cuts waste through insulation, switching off, and choosing transport wisely. Saved energy needs no fuel and makes no pollution.