Utilidors may also be used to carry fuel lines, such as natural gas.

The original organic material, with the aid of heat and pressure, becomes a fuel such as oil or gas.

Thus, it had to be above the cost of inputs such as natural gas and coal.

Over 97% have basic services such as gas, electricity, garbage and drainage.

The region is rich in natural resources such as oil and natural gas.

Most of our energy comes from fossil fuels such as coal, oil and natural gas.

This includes products pumped from the installation such as oil or gas.

The two countries also signed deals in areas such as oil, natural gas, textiles, trade and public housing.

Various power ups are available throughout the game such as gas that makes all other characters fall asleep.

One substance is the dispersion medium, such as water or gas.