电动汽车究竟能减多少碳排放?

电动汽车究竟能减多少碳排放?

2025-08-31Electric Vehicle
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金姐
早上好,老王!我是金姐,欢迎收听专为您打造的 Goose Pod。今天是8月31日,星期日。
雷总
我是雷总。今天我们来聊一个热门话题:电动汽车究竟能为我们减少多少碳排放?
金姐
哎哟喂,雷总,说到电动车,我刚看到一个新闻,通用汽车的工程师们开着一辆皮卡,一次充电居然跑了超过1000英里!这简直是破纪录了,听着就厉害。
雷总
没错,这个测试太硬核了!他们用的是一辆2026款的Silverado电动皮卡,为了达到这个里程,团队可是下足了功夫。他们把车速控制在每小时20到25英里,尽量减少刹车,还做了空气动力学改装。
金姐
等一下,时速20多英里?那不是跟骑自行车差不多慢?这在现实生活中根本不可能嘛。咱们普通人开车,谁能这么开?这不是实验室里才有的数据吗?
雷总
哈哈,金姐你问到点子上了。这确实是优化到极致的理想状况。但这个实验的目的,就是想告诉大家,电动车的能效潜力有多大,以及驾驶习惯对续航里程的影响有多么巨大。
金姐
好吧,那我们来看看为什么要这么极致地追求电动化。这背后的大背景是什么?我们的交通到底制造了多少污染?给我们这些普通听众好好科普一下。
雷总
这个数字很惊人。在美国,整个交通运输业的温室气体排放,占到了全国总排放量的28%。从1990年到2022年,这个领域的排放量增长比任何其他行业都多,主要就是因为出行需求一直在涨。
金姐
28%!哎哟喂,这可不是个小数字。那具体到我们每天开的车呢?轿车和我们常说的SUV、皮卡,哪个是排放大头?我猜肯定是那些大家伙。
雷总
完全正确。在交通排放里,我们日常开的轿车和轻型卡车(包括SUV和皮卡)占了57%,是绝对的大头。其中更有趣的是,从90年到现在,轿车的排放其实下降了43%。
金姐
下降了?那怎么总量还涨了呢?这里面肯定有猫腻。快说,是不是那些大家伙拖后腿了?我就知道,现在路上跑的SUV和皮卡越来越多了。
雷总
是的,问题就出在这里。同期,轻型卡车的排放量暴增了118.3%!这个增幅完全抵消了轿车节能减排的努力,还让总数涨了一大截。所以,车辆大型化是交通碳排放增加的一个关键因素。
金姐
好了,既然传统汽车污染这么严重,那换成电动车就完美了吗?我可听说了不少反对的声音。很多人说,电动车只是看起来“零排放”,生产电池的过程,本身就是个高污染、高耗能的大户。
雷总
这是一个非常核心的争议点。没错,生产一块60千瓦时的电池,大约会产生9到12吨的二氧化碳。但我们要看全生命周期。国际能源署估算过,即使算上电池生产,一辆电动车在其整个生命周期里的总排放,也只有同级别燃油车的一半左右。
金姐
一半听起来不错,但还有个问题。你充电的电是哪来的?如果电本身就是烧煤发出来的,那不就是把污染从汽车排气管转移到了发电厂的烟囱里吗?这算哪门子的环保?
雷总
这个问题问得好!这涉及到电网的清洁程度。目前来看,如果用燃煤发的电,减排效果确实会打折扣。但全球的趋势是能源结构在向可再生能源转型。预计到2035年,光伏和风能发电将占美国发电量的40%以上,电网会越来越干净。
金姐
听起来前景不错,但为什么感觉尤其是在美国,大家对电动车的接受度好像并不高?技术是领先的,销量却跟不上欧洲和中国,这是为什么?价格贵是主要原因吗?
雷总
价格是一个重要因素,电动车平均比燃油车贵一万美金。还有对电池寿命、维修成本的担忧。但更深层次的,是些独特的心理因素。比如社会规范,路上跑的电动车少,大家就没有换车的社交压力。
金姐
哎哟喂,我明白了。就是一种“大家都开油车,我为什么要当那个少数派”的从众心理,还有就是习惯了,懒得改。这种现状维持偏见,听起来有点像咱们说的“路径依赖”,对吧?改变总是很难的。完美!
金姐
那未来怎么走?要想让大家都开上电动车,总得拿出点实际的解决方案吧?光靠画大饼可不行,得让老百姓看到实实在在的好处和可能性才行。
雷总
当然,汽车厂商们已经行动起来了。比如福特就计划在2027年推出一系列价格亲民的电动车,其中甚至包括一款起售价只要3万美元的中型皮卡。这正是为了解决成本这个最大的痛点。
金姐
总而言之,电动车确实能显著减少碳排放,但这需要电网更清洁、车价更亲民。
雷总
是的,并且要选择适合自己需求的车型。今天的Goose Pod就到这里,感谢您的收听。我们明天再见!

## Study Reveals Significant Greenhouse Gas Reductions from Electric Vehicles Across the US **News Title:** How much do electric vehicles actually cut climate pollution? **Report Provider/Author:** Futurity, citing the University of Michigan **Date/Time Period Covered:** The study analyzes "generic" vehicle versions produced in 2025, representative of new vehicles in the marketplace. The news was published on August 27, 2025. ### Main Findings and Conclusions: A comprehensive new study, described as the most thorough to date, concludes that **choosing a more electrified vehicle significantly reduces drivers' greenhouse gas emissions, regardless of their location within the contiguous United States.** The research, published in the journal *Environmental Science & Technology*, evaluated emissions from a "cradle-to-grave" perspective, encompassing vehicle manufacturing, use, and disposal. The study's key takeaway is that **Battery Electric Vehicles (BEVs) consistently demonstrate lower lifetime emissions than any other vehicle type in every county across the contiguous US.** This finding is crucial for climate action, as transportation accounts for 28% of greenhouse gas emissions, and reductions are needed to mitigate climate impacts like flooding and wildfires. ### Key Statistics and Metrics: * **ICE Pickup Trucks:** On average, conventional gasoline (ICE) pickup trucks were the highest emitters, producing **486 grams of carbon dioxide equivalent (CO2e) per mile.** * **Hybrid Pickup Trucks:** Switching to a hybrid pickup truck would reduce emissions from ICE pickups by **23%.** * **Electric Pickup Trucks:** A fully electric pickup truck represents a **75% drop** in emissions compared to a gasoline pickup. * **BEV Pickup Trucks with Cargo:** A BEV pickup truck carrying **2,500 pounds** still emitted less than **30%** of an ICE pickup with no cargo. * **Compact Sedan BEVs:** Compact sedan BEVs had the lowest emissions overall, at just **81 grams of CO2e per mile**, which is less than **20%** of the per-mile emissions of a gas-powered pickup. * **Lowest Emission BEV:** The lowest emission vehicle class was the compact sedan BEV with the lowest range, **200 miles**. The emissions associated with producing batteries for longer-range vehicles slightly increased their lifetime greenhouse gas contributions. ### Important Recommendations: The study emphasizes two primary recommendations for drivers looking to reduce their emissions: 1. **Electrify your ride:** Transitioning to hybrid or fully electric vehicles is the most impactful step. 2. **Match your vehicle with your needs:** Opt for the smallest vehicle that suits your purposes. For example, a sedan BEV is recommended for solo commuting over a larger vehicle. ### Significant Trends or Changes: * **Industry Commitment to Electrification:** Despite potential headwinds from federal policy (e.g., reduced incentives like the electric vehicle tax credit), the automotive industry, exemplified by Ford's announcement of a more affordable electric vehicle platform, is heavily invested in electrification. Manufacturers recognize EVs as the future of transportation. * **Global Dominance of EVs:** EVs are becoming the dominant powertrain in other parts of the world, and manufacturers are aware of this trend for the US market. ### Notable Risks or Concerns: * **Impact of Battery Production:** The study highlights that the emissions associated with producing batteries for vehicles with longer ranges can increase their overall lifetime greenhouse gas contributions. This underscores the importance of choosing appropriately sized vehicles. ### Material Financial Data: No specific financial data or cost analyses were presented in this news summary. ### Additional Information: * **Online Calculator:** The researchers have developed a free online calculator that allows drivers to estimate their greenhouse gas emissions based on their vehicle, driving habits, and location. * **Study Scope:** The analysis considered 35 different combinations of vehicle class (pickups, sedans, SUVs) and powertrains (conventional internal combustion engines, hybrid electric, plug-in hybrids, and battery electric). * **Location Factors:** Location influences emissions due to temperature effects on vehicle efficiency and range, as well as variations in power grid emissions. * **Funding:** Support for the study came from the State of Michigan Department of Labor and Economic Opportunity and the UM Electric Vehicle Center. Researchers from the University of Michigan and Ford contributed to the work.

How much do electric vehicles actually cut climate pollution?

Read original at Futurity

Choosing a more electrified vehicle will reduce drivers’ greenhouse gas emissions, regardless of where they live in the contiguous United States, according to a new study.The analysis is the most comprehensive to date, the authors say, providing drivers with estimates of emissions per mile driven across 35 different combinations of vehicle class and powertrains.

That included conventional gas pickups, hybrid SUVs, and fully electric sedans with dozens of other permutations.In fact, the team created a free online calculator that lets drivers estimate greenhouse gas emissions based on what they drive, how they drive, and where they live.The work appears in the journal Environmental Science & Technology.

“Vehicle electrification is a key strategy for climate action. Transportation accounts for 28% of greenhouse gas emissions and we need to reduce those to limit future climate impacts such as flooding, wildfires, and drought events, which are increasing in intensity and frequency,” says Greg Keoleian, senior author of the new study and a professor at the University of Michigan School for Environment and Sustainability, or SEAS.

“Our purpose here was to evaluate the cradle-to-grave greenhouse gas reduction from the electrification of vehicles compared with a baseline of gasoline-powered vehicles.”In addition to helping drivers understand their emissions, Keoleian and colleagues say this information will be valuable to the automotive industry and policymakers.

While EVs are driving into headwinds from a federal policy standpoint, the industry is committed to electrification, Keoleian says. As an example, Ford Motor Co. recently announced plans for a more affordable electric vehicle platform in what it called a “Model T moment” for the company.“The government is backing off incentives, like the electric vehicle tax credit, but the original equipment manufacturers are heavily invested and focused on the technology and affordability of EVs,” says Keoleian, who is also a co-director of the UM Center for Sustainable Systems, or CSS.

“EVs are becoming the dominant powertrain in other parts of the world and manufacturers recognize that is the future for the US.”In their “cradle-to-grave” analysis, Keoleian and colleagues studied emissions numbers not just from driving vehicles, but also from making and disposing of them. In doing so, they considered an array of factors: powertrains, vehicle class, driving behavior, and location.

The powertrains included conventional internal combustion engines, hybrid electric, plug-in hybrids, and fully electric, or battery electric. Vehicles with these powertrains are abbreviated ICEV, HEV, PHEV, and BEV, respectively. For vehicle class, they considered pickups, sedans, and sport utility vehicles (they considered “generic” versions of these vehicles produced in 2025, which are representative of new vehicles in the marketplace).

Driving behavior included familiar factors such as highway vs. city driving, but also more modern considerations, like location of the vehicle and how often drivers of PHEVs were driving on battery power vs. gasoline.Location affects emissions in two ways, Keoleian says. First, all vehicles—especially BEVs and PHEVs—use more fuel at lower temperatures and have lower range in locations with lower temperatures.

Second, power grid emissions vary by location, so charging EVs in a county with a cleaner grid would emit less greenhouse gas.In addressing all these variables in a single study, the researchers could make comparisons of emissions from different vehicles in an apples-to-apples way. This enables a detailed comparison of, say, a gasoline-powered pickup in Perry County, Pennsylvania, with a fully electric compact sedan in San Juan County, New Mexico.

In addition to these detailed comparisons, the work also afforded important big-picture takeaways. The study showed for the first time that BEVs have lower emissions over their lifetime than any other vehicle type in every county in the contiguous US. On average, ICE pickup trucks were the highest emitters at 486 grams of carbon dioxide equivalent—a measure of greenhouse gas emissions—per mile.

Switching to a hybrid pickup would reduce that by 23%, while a fully electric pickup represented a 75% drop.Another eye-catching stat came in the team’s analysis of how emissions changed while a pickup was hauling weight. A BEV pickup truck carrying 2,500 pounds still emitted less than 30% of an ICE pickup with no cargo.

Overall, compact sedan EVs had the lowest emissions at just 81 grams of carbon dioxide equivalent per mile—less than 20% of the per mile emissions of a gas-powered pickup. The lowest emission vehicle class was the compact sedan BEV with the lowest range, 200 miles. The emissions associated with producing batteries for vehicles with longer ranges bumped up their lifetime greenhouse gas contributions.

That also highlights another big take-away from the study, Keoleian says. Besides electrifying your ride, picking the smallest vehicle that suits your purposes will also reduce emissions.“The thing is really matching your vehicle with your needs,” Keoleian says.“Obviously, if you’re in the trades, you may need a pickup truck.

But you can get a battery electric pickup truck. If you’re just commuting to work by yourself, I’d recommend a sedan BEV instead.”With the team’s online calculator, people who are interested in vehicle emissions can get answers personalized for their situations.Support for the study came from the State of Michigan Department of Labor and Economic Opportunity and the UM Electric Vehicle Center.

Additional researchers from the University of Michigan and Ford contributed to the work.Source: University of Michigan

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