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answered 1 : The gaseous fuel formed from the conversion of organic waste such as dead plant, animal material, animal dung and kitchen waste is called biogas. Whereas, natural gas is extracted with petroleum deposits when crude oil is brought to the surface.
answered 2 : revolt or rebellion against constituted authority, especially by sailors against their officers.
answered 3 : Wood has been used as fuel for many thousand years and it is still being used as fuel mostly in the rural parts.
Hardwood is preferred to softwood as fuel as it produces less smoke and burns longer.
A woodstove or fireplace adds to ambience and warmth to a home.
Since the time of human beings began building shelters, wood has been a important construction material.
It is also used to build houses and boats.
Until late of the 19th century all boats are made from wood; remains of wood are used commonly in boat construction.
Engineered wood is being used in largely in construction of residential and commercial buildings.
Wood is used as a supporting material in building made of other materials like in roofs, interior doors, etc.
Wood flooring is a product made from timber that is used as flooring.
Engineered wood components are often used in construction and industrial applications.
Wood has always been used for furniture like chairs and cots.
It is also used in the form of cutlery like wooden spoon, chopsticks.
Wood is also used as an artistic mode. It includes totem poles, woodcut printmaking, and certain types of musical instruments.
Many types of equipments used in sports are made of wood. Example - Cricket bats, baseball bats.
Other types of recreational sports equipments like skis, hockey sticks, archery bows are commonly made from wood.
Disadvantages of Wood:
Wood energy produces green house gases.
Transportation of wood to urban areas can be expensive.
Wood is hygroscopic and it will absorb surrounding vapors loses moisture below the fiber saturation point.
Biotic factors can cause decay of wood by mold fungi, bacteria and insects.
Abiotic factors like sun, wind, water, fire and certain chemicals can cause deterioration and destruction of wood.