Describe how people’s understanding of the environment and the potential environmental impacts of emissions such as lead, as well as scientific knowledge, have caused changes in the vehicles that we drive.
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Answer:
CARS CAN CONVEY a sense of freedom and movement, not to mention style and status. But they also can have a big impact on the planet. Here's a few key areas to consider.
Cars consume a lot of energy before they ever make it to the open road. Automotive production leaves a giant footprint because materials like steel, rubber, glass, plastics, paints, and many more must be created before a new ride is ready to roll.
Similarly, the end of a car’s life doesn’t mark the end of its environmental impact. Plastics, toxic battery acids, and other products may stay in the environment. Fortunately, junkyard pile-ups are becoming much smaller than they were in the past. About three-quarters of today’s average car, including the bulk of a steel frame, can be recycled.
Production, recycling, and disposal costs to the environment are difficult to quantify and largely beyond the control of most consumers. It's also true that most of an automobile's environmental impact, perhaps 80 to 90 percent, will be due to fuel consumption and emissions of air pollution and greenhouse gases that climate scientists say are driving global warming. Fortunately, the level of that impact is very much under the control of the driver.
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