1. Discuss some of the trade-offs of having lighter, more sustainable vehicles.
2. Discuss any ethical issues you can identify in this scenario.

Producing vehicles with materials such as aluminum, carbon fiber, and high-strength steel are decreasing the weight of vehicles by about 200 pounds, while still providing the same amount of strength and without increasing the retail price. The use of lighter materials also allows for vehicles to be bound with structural adhesives and sealants, which can add rigidity to the body of the vehicle, absorb shock, and potentially provide a safer ride for the customer. As cars become lighter, consumers face higher repair costs when it comes time to repair their environmentally friendly vehicles. These lighter materials are difficult to repair because welding and cutting weaken the surface. Additionally, there have been cases wherein the auto adhesives have melted when reaching certain temperatures.