Compressed natural gas (CNG ) cars are much more environmentally friendly than gas-powered cars, as they can reduce carbon emissions by 10% to 20% (or more).

1. Fiat Palio - India
2. Renault Logan - India
3. Hyundai Santro Xing CNG - India
4. Mitsubishi Lancer - India
5. Lifan 520 Sedan - China
6. Volkswagen Passat - Europe
7. Opel Zafiria - Europe
8. Mercedes-Benz B 170 NGT Blue Efficiency - Europe
9. Ford Focus NGV -Italy, Germany, Austria, the Netherlands and Sweden
10. Honda Civic GX -US (California and New York only), England, Japan, Canada, Pakistan and Brazil

[ The World’s Cleanest Cars ]

Greenhouse gases naturally blanket the Earth and keep it about 33 degrees Celsius warmer than it would be without these gases in the atmosphere. This is called the Greenhouse Effect.

The greenhouse effect is important. Without the greenhouse effect, the Earth would not be warm enough for humans to live. But if the greenhouse effect becomes stronger, it could make the Earth warmer than usual. Even a little extra warming may cause problems for humans, plants, and animals.

Have you ever seen a greenhouse? Most greenhouses look like a small glass house. Greenhouses are used to grow plants, especially in the winter. Greenhouses work by trapping heat from the sun. The glass panels of the greenhouse let in light but keep heat from escaping. This causes the greenhouse to heat up, much like the inside of a car parked in sunlight, and keeps the plants warm enough to live in the winter.

The Earth’s atmosphere is all around us. It is the air that we breathe. Greenhouse gases in the atmosphere behave much like the glass panes in a greenhouse. Sunlight enters the Earth’s atmosphere, passing through the blanket of greenhouse gases. As it reaches the Earth’s surface, land, water, and biosphere absorb the sunlight’s energy. Once absorbed, this energy is sent back into the atmosphere. Some of the energy passes back into space, but much of it remains trapped in the atmosphere by the greenhouse gases, causing our world to heat up.

[ Reference - epa , Pic Credit - WashingtonPost ]

Compressed natural gas (methane) is a cleaner alternative to other automobile fuels such as gasoline (petrol) and diesel. As of 2005, the countries with the largest number of natural gas vehicles were Argentina, Brazil, Pakistan, Italy, Iran, and the USA.

Natural gas is a major source of electricity generation through the use of gas turbines and steam turbines.

Natural gas is supplied to homes, where it is used for such purposes as cooking in natural gas-powered ranges and/or ovens, natural gas-heated clothes dryers, heating/cooling and central heating.

Natural gas is a major feedstock for the production of ammonia, via the Haber process, for use in fertilizer production.

Russian aircraft manufacturer Tupolev is currently running a development program to produce LNG- and hydrogen-powered aircraft.

Natural gas is also used in the manufacture of fabrics, glass, steel, plastics, paint, and other products.

The major difficulty in the use of natural gas is transportation and storage because of its low density. Natural gas pipelines are economical, but are impractical across oceans.

Reference - Wiki

We hear more about Alternative Energy, so what is it. Alternative Energy is the energy that is derived from nontraditional sources like compressed natural gas, solar, hydroelectric or wind etc.

Natural Gas

A hydrocarbon gas that is usually obtained from underground sources, often in association with petroleum and coal deposits, as opposed to gases which are manufactured. 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).

Before natural gas can be used as a fuel, it must undergo extensive processing to remove almost all materials other than methane. The by-products of that processing include ethane, propane, butanes, pentanes and higher molecular weight hydrocarbons, elemental sulfur, and sometimes helium and nitrogen.

Compressed natural gas (methane) is a cleaner alternative to other automobile fuels such as gasoline (petrol) and diesel. As of 2005, the countries with the largest number of natural gas vehicles were Argentina, Brazil, Pakistan, Italy, Iran, and the USA.

[ Reference - wiki ]