Energy is a fundamental concept in physics that describes the ability or capacity to do work. It comes in various forms, renewable and non-renewable, and can be transformed from one type to another.
Definition: Energy is the ability to cause changes in matter. It is not a physical substance but a property that a system can process.
Kinetic energy is the energy of motion. Any object that is moving has kinetic energy - motion of waves, electrons, atoms, molecules, substances, objects and sound.
Potential energy is stored energy an object has due to its position or state. There are more than one type of potential energy: gravitational energy, elastic energy, chemical energy, mechanical energy and nuclear energy.
Both kinetic and potential energy are essential concepts in understanding the behavior of physical systems, and they often interconvert. For example, when you drop an object, it initially has gravitational potential energy, which is converted to kinetic energy as it falls.
Renewable energy sources is energy from sources that are naturally replenishing but flow-limited.
Non-renewable energy sources do not form or replenish in a short period of time (such as crude oil, natural gas, coal, uranium).
United Nations Sustainable Development GOALS - Goal 7 / Affordable & Clean Energy
Goal 7 is about ensuring access to clean and affordable energy, which is key to the development of agriculture, business, communications, education, healthcare and transportation.
The world continues to advance towards sustainable energy targets - but not fast enough. At the current pace, about 660 million people will still lack access to electricity and close to 2 billion people will still rely on polluting fuels and technologies for cooking by 2030.
Our everyday life depends on reliable and affordable energy. And yet the consumption of energy is the dominant contributor to climate change, accounting for around 60 percent of total global greenhouse gas emissions.
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