Resources and energy

plant materials and animal waste used as fuel

a hot fragment of wood or coal that is left from a fire and is glowing or smoldering

a flammable hydrocarbon oil used as fuel in lamps and heaters

the act of decreasing something markedly

skillfulness in avoiding wasted time and effort; "she did the work with great efficiency"

a hot fragment of wood or coal that is left from a fire and is glowing or smoldering

a healthy capacity for vigorous activity; "jogging works off my excess energy"; "he seemed full of vim and vigor"

the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil

fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content

provide with a combustible substance that provides energy; "fuel aircraft, ships, and cars"

a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely

a fossil fuel in the gaseous state; used for cooking and heating homes

of or relating to the heat in the interior of the earth

energy derived from the heat in the interior of the earth

of or relating to the heat in the interior of the earth

a flammable hydrocarbon oil used as fuel in lamps and heaters

a flammable hydrocarbon oil used as fuel in lamps and heaters

a flammable hydrocarbon oil used as fuel in lamps and heaters

in accordance with nature; relating to or concerning nature; "a very natural development"; "our natural environment"; "natural science"; "natura…

a fossil fuel in the gaseous state; used for cooking and heating homes

resources (actual and potential) supplied by nature

resources (actual and potential) supplied by nature

that can not be renewed; "books on that shelf are unrenewable"; "gas and oil are nonrenewable resources"

oil paint containing pigment that is used by an artist

oil paint containing pigment that is used by an artist

oil paint containing pigment that is used by an artist

capable of being renewed; replaceable; "renewable energy such as solar energy is theoretically inexhaustible"

any natural resource (as wood or solar energy) that can be replenished naturally with the passage of time

a source of aid or support that may be drawn upon when needed; "the local library is a valuable resource"

relating to or derived from the sun or utilizing the energies of the sun; "solar eclipse"; "solar energy"

energy from the sun that is converted into thermal or electrical energy; "the amount of energy falling on the earth is given by the solar consta…

energy from the sun that is converted into thermal or electrical energy; "the amount of energy falling on the earth is given by the solar consta…

the act of winding or twisting; "he put the key in the old clock and gave it a good wind"

that can not be renewed; "books on that shelf are unrenewable"; "gas and oil are nonrenewable resources"

a healthy capacity for vigorous activity; "jogging works off my excess energy"; "he seemed full of vim and vigor"

a healthy capacity for vigorous activity; "jogging works off my excess energy"; "he seemed full of vim and vigor"

the act of winding or twisting; "he put the key in the old clock and gave it a good wind"

the act of winding or twisting; "he put the key in the old clock and gave it a good wind"

a toxic mixture of gases (including carbon dioxide and carbon monoxide and nitrogen) after an explosion of firedamp in a mine

a person or thing that is a resource that helps make something easier or possible to do; "visual aids in teaching"; "his job was to give technic…

a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air pollution"; "a smell of chemicals in th…

a gas made of carbon monoxide and hydrogen and nitrogen; made by passing air over hot coke

one of the coiled chambered fossil shells of extinct mollusks

a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare

a person or thing that is a resource that helps make something easier or possible to do; "visual aids in teaching"; "his job was to give technic…

the envelope of gases surrounding any celestial body

a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chamber…

hydrocarbon gases, usually propane or butane, kept under pressure

fill (a ship's bunker) with coal or oil

occurs in natural gas; used in the manufacture of rubber and fuels

any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers

a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleachi…

fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period

the act of consuming something

a dark oil consisting mainly of hydrocarbons

a colorless toxic gas with a pungent almond odor; has been used in chemical warfare

a gradual depletion of energy or resources; "a drain on resources"; "a drain of young talent by emigration"

the efficient use of resources; "economy of effort"

a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as…

a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as…

gases ejected from an engine as waste products

the act of exhausting something entirely

the act of consuming something

a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovere…

a colorless poisonous gas; made by the oxidation of methanol

a fossilized cast or impression of algae of the order Fucales

a gas that contributes to the greenhouse effect by absorbing infrared radiation

a gas that contributes to the greenhouse effect by absorbing infrared radiation

a person or thing that is a resource that helps make something easier or possible to do; "visual aids in teaching"; "his job was to give technic…

a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abun…

something that is inhaled

energetic vitality; "her creative juices were flowing"

hydrocarbon gases, usually propane or butane, kept under pressure

a poisonous or foul smelling gas emitted from the earth

a colorless poisonous gas; made by the oxidation of methanol

a colorless odorless gas used as a fuel

a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by vol…

a dark oil consisting mainly of hydrocarbons

a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphe…

a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the acti…

(British usage) kerosine

a dark oil consisting mainly of hydrocarbons

a colorless poisonous gas that smells like new-mown hay; used in chemical warfare

a colorless gas with a strong fishy smell; used as a pesticide

colorless gas found in natural gas and petroleum; used as a fuel

a flammable gas obtained by cracking petroleum; used in organic synthesis

a flammable gas obtained by cracking petroleum; used in organic synthesis

something or someone turned to for assistance or security; "his only recourse was the police"; "took refuge in lying"

something or someone turned to for assistance or security; "his only recourse was the police"; "took refuge in lying"

something or someone turned to for assistance or security; "his only recourse was the police"; "took refuge in lying"

the product of vaporization of a solid

a mixture of hydrogen and carbon monoxide with small amounts of other gases; made by blowing steam over hot coke or coal

a hard natural coal that burns slowly and gives intense heat

a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere

a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere

an obsolete name for nitrogen

the air that is inhaled and exhaled in respiration; "his sour breath offended her"

a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in phot…

a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in phot…

a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in phot…

act of getting or draining something such as electricity or a liquid from a source; "the drawing of water from the well"

a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amount…

a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amount…

intermediate between peat and bituminous coal

a colorless odorless gaseous element that gives a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts

refuge from danger or observation; "he felt secure in his father's shadow"

the atmosphere and outer space as viewed from the earth

the sky as viewed during daylight; "he shot an arrow into the blue"

a bituminous coal that burns with a luminous flame

the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life

drawing off water from its main channel as for irrigation

drawing of fluid or inflammation away from a diseased part of the body

exhaled breath

a hard black form of lignite that takes a brilliant polish and is used in jewelry or ornamentation

(trademark) a liquid that temporarily disables a person; prepared as an aerosol and sprayed in the face, it irritates the eyes and causes dizzin…

pulverized bituminous coal; used as a foundry facing