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Five Hsin asked in 社會與文化語言 · 1 decade ago





Green power is a subset of renewable energy (Graph 1) and represents those renewable energy resources and technologies that provide the highest environmental benefit. EPA defines green power as electricity produced from solar, wind, geothermal, biogas, biomass, and low-impact small hydroelectric sources. Customers often buy green power for avoided environmental impacts and its greenhouse gas reduction benefits.

Although the impacts are small, some renewable energy technologies have an impact on the environment. For example, large hydroelectric resources can have environmental trade-offs associated with issues such as fisheries and land use.

Conventional power includes the combustion of fossil fuels (coal, natural gas, and oil) and the nuclear fission of uranium. Fossil fuels have environmental costs from mining, drilling, or extraction, and emit greenhouse gases and air pollution during combustion. Although nuclear power generation emits no greenhouse gases during power generation, it does require mining, extraction, and long-term radioactive waste storage.

Type of emissions:

Anthropogenic emissions are produced as a result of human activity that unnaturally releases CO2 emissions into the atmosphere. One of the largest sources of anthropogenic CO2 emissions is the combustion of fossil fuels or fossil fuel-based products to produce electricity.

Biogenic emissions, in contrast, result from natural biological processes, such as the decomposition or combustion of vegetative matter. Biogenic emissions are part of a closed carbon loop. Biogenic CO2 emissions are balanced by the natural uptake of CO2 by growing vegetation, resulting in a net zero contribution of CO2 emissions to the atmosphere. Examples of biogenic emission sources include burning vegetation (biomass) to produce electricity or using plant-based biofuels for transport.

1 Answer

  • 1 decade ago
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    綠色力量是一個子集可再造能源(圖表1) 和代表提供最高的環境好處的那些可再造能源資源和技術。EPA 定義綠色力量作為電由太陽, 風, 地熱導致, biogas 、生物量, 和低衝擊小水力發電的來源。顧客經常購買綠色力量為被避免的環境影響和它的溫室氣體減少有益於。雖然衝擊小, 一些可再造能源技術有對環境的衝擊。例如, 大水力發電的資源可能有環境交易與相關問題譬如漁場和土地利用。

    常規力量包括礦物燃料(煤炭、天然氣, 和油的)

    燃燒並且鈾核分裂。礦物燃料有環境費用從採礦、鑽井, 或提取, 和散發溫室氣體和大氣汙染在燃燒期間。雖然核能發電不散發溫室氣體在發電期間, 它要求採礦、提取, 和長期放射性廢物存貯。

    類型放射: 人類放射導致由於不自然地釋放二氧化碳排放入大氣的人類活動。人類二氧化碳排放的當中一個最大的來源是礦物燃料或化石基於燃料的產品的燃燒導致電。生物活動所產生的放射, 相反, 起因於自然生物過程, 譬如植物生長的問題的分解或燃燒。生物活動所產生的放射是一個閉合的碳圈的一部分。生物活動所產生的二氧化碳排放由二氧化碳自然舉起平衡由生長植被, 造成二氧化碳排放的網零貢獻對大氣。生物活動所產生的放射來源例子包括灼燒的植被(生物量) 引起電或使用基於植物的biofuels 為運輸。

    Source(s): yahoo的字典
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