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Related Concept Videos

What is Energy?04:10

What is Energy?

The universe is composed of matter in different forms, and all forms of matter contain energy.  The different forms of energy on Earth originate from the Sun — the ultimate energy source. Plants capture light energy from the Sun, and, via the process of photosynthesis, convert it into chemical energy. This stored energy from plants can be harnessed in many ways. For example, eating plant products as food provides energy for our body to function, and burning wood or coal (fossilized plants)...
Electrical Energy01:10

Electrical Energy

Using electric appliances for a longer period of time consumes more electrical energy and results in a higher electric bill. The energy produced by the transfer of electrons from one point to another is known as electrical energy. If power is delivered at a constant rate, the electrical energy can be defined as the product of power used by the device for a period of time. The energy unit on electric bills is the kilowatt-hour, where one kilowatt-hour is equivalent to 3.6 × 106 joules. The...
Energy Conservation and Bernoulli's Equation01:16

Energy Conservation and Bernoulli's Equation

Applying the conservation of energy principle or the work-energy theorem to an incompressible, inviscid fluid in laminar, steady, irrotational flow leads to Bernoulli's equation. It states that the sum of the fluid pressure, potential, and kinetic energy per unit volume is constant along a streamline.
All the terms in the equation have the dimension of energy per unit volume. The kinetic energy per unit volume is called the kinetic energy density, and the potential energy per unit volume is...
Energy Basics02:27

Energy Basics

Chemical reactions, such as those that occur when you light a match, involve changes in energy as well as matter.
Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground cistern.
Power and Energy01:12

Power and Energy

The power and energy delivered to an element are subjects of great significance in the field of electrical engineering. It is a well-known fact that a 100-watt light bulb emits more light than a 60-watt one. Therefore, power and energy calculations play a crucial role in the analysis of electrical circuits.
Power, defined as the time rate of expending or absorbing energy, is quantified in units called watts (W). The relation between power and energy is mathematically given as

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Related Experiment Video

Updated: Jul 11, 2026

Façade-Level Monitoring of CO2 Variability under Urban Heat Island Conditions using Low-Cost Sensor Data Loggers
07:12

Façade-Level Monitoring of CO2 Variability under Urban Heat Island Conditions using Low-Cost Sensor Data Loggers

Published on: December 12, 2025

Energy, energy efficiency, and the built environment.

Paul Wilkinson1, Kirk R Smith, Sean Beevers

  • 1London School of Hygiene and Tropical Medicine, London, UK. paul.wilkinson@lshtm.ac.uk

Lancet (London, England)
|September 18, 2007
PubMed
Summary

Technological advancements improve energy efficiency, reducing greenhouse gas emissions and improving urban health. Shifting to renewable energy sources like electricity and hydrogen enhances air quality and well-being, especially in low-income nations.

Related Experiment Videos

Last Updated: Jul 11, 2026

Façade-Level Monitoring of CO2 Variability under Urban Heat Island Conditions using Low-Cost Sensor Data Loggers
07:12

Façade-Level Monitoring of CO2 Variability under Urban Heat Island Conditions using Low-Cost Sensor Data Loggers

Published on: December 12, 2025

Area of Science:

  • Environmental Science
  • Public Health
  • Energy Policy

Background:

  • Technological progress has historically increased energy efficiency alongside consumption, closely linked to socioeconomic development.
  • Urban energy use presents opportunities for efficiency gains, impacting greenhouse gas emissions and public health.
  • The transition to renewable energy sources necessitates cleaner energy carriers, such as electricity and hydrogen, benefiting urban air quality.

Purpose of the Study:

  • To explore the potential of energy efficiency and technology in urban settings to mitigate greenhouse gas emissions.
  • To examine the health co-benefits of improved energy use, including protection against temperature-related illnesses and fuel poverty.
  • To assess the impact of renewable energy adoption on urban air quality and the specific needs of low-income countries regarding energy access and indoor air pollution.

Main Methods:

  • Literature review of technological advancements in energy exploitation since the late 19th century.
  • Analysis of the correlation between energy consumption and socioeconomic development.
  • Examination of case studies on energy efficiency measures in urban environments and homes.
  • Review of policies promoting renewable energy and cleaner energy carriers.
  • Assessment of health impacts related to energy use, including indoor air pollution and access to electricity.

Main Results:

  • Increased energy efficiency in urban areas and homes can significantly reduce greenhouse gas emissions.
  • Improvements in energy technology can lead to better health outcomes, reducing temperature-related morbidity and mortality and alleviating fuel poverty.
  • A shift to electricity and hydrogen as energy carriers improves urban air quality.
  • Disseminating affordable technology in low-income countries is crucial for reducing indoor air pollution and improving health and well-being through better access to electricity.

Conclusions:

  • Implementing energy-efficient technologies in cities and homes is vital for environmental sustainability and public health.
  • Transitioning to renewable energy sources offers substantial benefits for urban air quality and overall well-being.
  • Addressing energy poverty and indoor air pollution in low-income countries through accessible technology and electricity access is a key global health priority.