Natural Gas

Underground deposits of gases consisting of 50 to 90 percent methane (CH4) and small amounts of heavier gaseous hydrocarbon compounds such as propane (C3H8) and butane (C4H10).

Natural resource

(e.g., tree biomass, fresh water, fish) whose supply can essentially never be exhausted, usually because it is continuously produced.

Nitrous oxide

commonly known as laughing gas,[1] is a chemical compound with the formula N2O. N2O is a greenhouse gas with tremendous global warming potential (GWP). When compared to carbon dioxide (CO2), N2O has 310 times the ability per molecule of gas to trap heat in the atmosphere.

Noise Pollution

Environmental pollution made up of harmful or annoying noise.

Non Governmental Organization (NGO)

An organization centred around a cause or causes that works outside the sphere of governments. NGOs often lobby governments in an attempt to influence policy.

Non Renewable Resources

Natural resources that are not naturally replenished once they have been harvested. Non-renewable resources can be used up completely or else used up to such a degree that it is economically impractical to obtain any more of them. Fossil fuels and metal ores are examples of non-renewable resources.

Nuclear fission

The splitting of uranium isotopes to produce heat, which is then harnessed to produce electricity.

Nuclear fusion

The fusing together of elements to produce either electrically-charged particles or heat, which is then harnessed to produce electricity. This technology is currently being researched but thus far is not cost-effective. Some scientists believe that it is possible to produce non-radioactive nuclear power with this type of technology.

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