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  2. Carbon-neutral fuel - Wikipedia

    en.wikipedia.org/wiki/Carbon-neutral_fuel

    Carbon-neutral fuel is fuel which produces no net-greenhouse gas emissions or carbon footprint. In practice, this usually means fuels that are made using carbon dioxide (CO 2 ) as a feedstock . Proposed carbon-neutral fuels can broadly be grouped into synthetic fuels , which are made by chemically hydrogenating carbon dioxide, and biofuels ...

  3. Environmental impact of concrete - Wikipedia

    en.wikipedia.org/wiki/Environmental_impact_of...

    The most effective method of production of this concrete would use the exhaust gas of a power plant, where an isolated chamber could control temperature and humidity. [32] In August 2019, reduced CO 2 cement was announced which "reduces the overall carbon footprint in precast concrete by 70%". [33]

  4. Alternative fuel - Wikipedia

    en.wikipedia.org/wiki/Alternative_fuel

    Alternative fuels, also known as non-conventional and advanced fuels, [1] are fuels derived from sources other than petroleum. [2] Alternative fuels include gaseous fossil fuels like propane , natural gas , methane , and ammonia ; biofuels like biodiesel , bioalcohol , and refuse-derived fuel ; and other renewable fuels like hydrogen and ...

  5. Sustainable energy - Wikipedia

    en.wikipedia.org/wiki/Sustainable_energy

    Producing one tonne of hydrogen through this process emits 6.6–9.3 tonnes of carbon dioxide. [172] While carbon capture and storage (CCS) could remove a large fraction of these emissions, the overall carbon footprint of hydrogen from natural gas is difficult to assess as of 2021 [update] , in part because of emissions (including vented and ...

  6. Climate change mitigation - Wikipedia

    en.wikipedia.org/wiki/Climate_change_mitigation

    Overall, food accounts for the largest share of consumption-based greenhouse gas emissions. It is responsible for nearly 20% of the global carbon footprint. Almost 15% of all anthropogenic greenhouse gas emissions have been attributed to the livestock sector. [105] A shift towards plant-based diets would help to mitigate climate change. [112]

  7. Renewable energy - Wikipedia

    en.wikipedia.org/wiki/Renewable_energy

    Most of the crops used to produce bioethanol and biodiesel are grown specifically for this purpose, [113] although used cooking oil accounted for 14% of the oil used to produce biodiesel as of 2015. [112] The biomass used to produce biofuels varies by region. Maize is the major feedstock in the United States, while sugarcane dominates in Brazil ...

  8. Carbon footprint - Wikipedia

    en.wikipedia.org/wiki/Carbon_footprint

    The carbon footprint explained Comparison of the carbon footprint of protein-rich foods [1]. A formal definition of carbon footprint is as follows: "A measure of the total amount of carbon dioxide (CO 2) and methane (CH 4) emissions of a defined population, system or activity, considering all relevant sources, sinks and storage within the spatial and temporal boundary of the population, system ...

  9. Substitute natural gas - Wikipedia

    en.wikipedia.org/wiki/Substitute_natural_gas

    Substitute natural gas (SNG), or synthetic natural gas, is a fuel gas (predominantly methane, CH 4) that can be produced from fossil fuels such as lignite coal, oil shale, or from biofuels (when it is named bio-SNG) or using electricity with power-to-gas systems.

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