2024年3月21日发(作者：谷歌浏览器在中国能用吗)

energy efficiency

Energy efficiency is the practice of using less energy

to provide the same amount of useful output from a

service (such as heating water, lighting, or cooling a

fridge).

For example, light emitting diode (LEDs) and pact

fluorescent lights (CFLs) have revolutionized energy

efficiency in lighting and use far less energy for the

same amount of illumination as traditional

incandescent bulbs.

If you switch from an old style lightbulb to a

fluorescent bulb you will be producing the same amount

of light, but using less energy. That is energy

efficiency.

Another example would be using proper insulation

material in a building so that less energy is required

for heating and cooling.

Simply put, if something uses less energy and to

deliver the same performance as its traditional

version, then it is energy efficient.

Every year a lot of energy is wasted because of heat

loss and inefficient technology. This leads to

increased carbon pollution and costs consumers and

businesses money.

According to the US Department of Energy, energy

efficiency is “one of the easiest and most cost

effective ways to bat climate change, clean the air we

breathe, improve the petitiveness of our businesses

and reduce energy costs for consumers.”

New technology is helping drive the mercialization of

new products that are much more energy efficient pared

to older alternatives. For example, modern energy-

efficient refrigerators use around 40 percent less

energy than conventional models did in 2001.

It is important not to confuse energy efficiency with

energy conservation. The main difference between the

two is that energy efficiency doesn’t require an

individual to change or alter their behavior and

habits, while that is the whole basis of energy

conservation (such as turning off appliances when they

are no longer in use).

Energy efficiency and renewable energy are considered

to be the twin pillars of sustainable energy policy.

The International Energy Agency’s “Energy Efficiency

2018” report found that efficiency gains would reduce

energy bills for consumers by more than $500 billion

dollars per year, lower energy imports and reduce air

pollution. Air pollution includes the release of

harmful particulates or substances into the atmosphere.

“While various countries are endowed with different

energy resources – whether it’s oil, gas, wind,

solar or hydropower – every single country has energy

efficiency potential,” said Dr Fatih Birol, the

IEA’s Executive Director.

“Efficiency can enable economic growth, reduce

emissions and improve energy security. Our study shows

that the right efficiency policies could alone enable

the world to achieve more than 40% of the emissions

cuts needed to reach its climate goals without

requiring new technology. Thanks to the critical

importance of energy efficiency in building a secure

and sustainable future, the IEA considers it the

‘first fuel’ and facilitates the exchange of best

practices among advanced and emerging economies.”