Engineering

Climate-friendly metal production: Why is it difficult?

Most people know that metals are made from ore, but how do we make gold from gravel? That's the process we must understand to be able to make the metal industry climate friendly. Here are some alternatives for CO2-free metal ...

Engineering

Fancy a side of 3D printed carrots and crickets with your meal?

As the global population continues to age and grow, the demand for protein-rich food is also expected to increase concurrently. This has also caused concerns on increasing greenhouse gases, land and water consumption associated ...

Energy & Green Tech

Spain bets on green hydrogen in clean energy push

As Europe seeks to move way from fossil fuels, Spain is racing ahead in developing green hydrogen, aided by a growing wind and solar power complex in efforts to decarbonise its economy.

Energy & Green Tech

EU lawmakers endorse ban on combustion-engine cars in 2035

The European Parliament on Wednesday threw its weight behind a proposed ban on selling new cars with combustion engines in 2035, seeking to step up the fight against climate change through the faster development of electric ...

Business

Opinion: Greenwashing decarbonization

An important piece of reporting by the New York Times and advocacy by the Environmental Defense Fund provides insight into the complexity of decarbonization and the need for care when auditing corporate climate disclosures. ...

Automotive

US agency opens probe into electric vehicle batteries

U.S. safety regulators have opened an investigation into electric and hybrid vehicle batteries after five automakers issued recalls due to possible defects that could cause fires or stalling.

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Gas

Gas is one of the three classical states of matter (the others being liquid and solid). Near absolute zero, a substance exists as a solid. As heat is added to this substance it melts into a liquid at its melting point (see phase change), boils into a gas at its boiling point, and if heated high enough would enter a plasma state in which the electrons are so energized that they leave their parent atoms from within the gas. A pure gas may be made up of individual atoms (e.g. a noble gas or atomic gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide). A gas mixture would contain a variety of pure gases much like the air. What distinguishes a gas from liquids and solids is the vast separation of the individual gas particles. This separation usually makes a colorless gas invisible to the human observer. The interaction of gas particles in the presence of electric and gravitational fields are considered negligible as indicated by the constant velocity vectors in the image.

The gaseous state of matter is found between the liquid and plasma states, the latter of which provides the upper temperature boundary for gases. Bounding the lower end of the temperature scale lie degenerative quantum gases which are gaining increased attention these days. High-density atomic gases super cooled to incredibly low temperatures are classified by their statistical behavior as either a Bose gas or a Fermi gas. For a comprehensive listing of these exotic states of matter see list of states of matter.

This text uses material from Wikipedia, licensed under CC BY-SA