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# 0E

0E (zero E) or 0-E may refer to. [1]

## E0

E0 or E00 can refer to.

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## On30 gauge

On30 (also called On2, O16.5 and Oe) '''gauge''' is the modelling of narrow gauge railways in O scale on HO gauge track in 1:48 scale ratio by American model railroaders, in 1:43.5 scale ratio by British and French model railroaders and 1:45 by Continental European model railroaders (excluding France).

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## Prime meridian

A prime meridian is a meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°.

## Zero element

In mathematics, a zero element is one of several generalizations of the number zero to other algebraic structures.

## Zero emission

Zero emission refers to an engine, motor, process, or other energy source, that emits no waste products that pollute the environment or disrupt the climate.

## Zero Emissions Research and Initiatives

Zero Emissions Research and Initiatives (ZERI) was established by Gunter Pauli in 1994 at the United Nations University (UNU) with the support of the Japanese Government.

## Zero-emissions vehicle

A zero-emissions vehicle, or ZEV, is a vehicle that emits no exhaust gas from the onboard source of power.

## Zero-energy building

A zero-energy building, also known as a zero net energy (ZNE) building, net-zero energy building (NZEB), or net zero building, is a building with zero net energy consumption, meaning the total amount of energy used by the building on an annual basis is roughly equal to the amount of renewable energy created on the site, or in other definitions by renewable energy sources elsewhere.

## Zero-energy universe

The zero-energy universe hypothesis proposes that the total amount of energy in the universe is exactly zero: its amount of positive energy in the form of matter is exactly canceled out by its negative energy in the form of gravity.

## References

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