Question

(slide 20) which of the following is a negative effect of materials technology? *
materials might react different over time.
materials can be reused and recycled.
materials can help the environment.
only older materials cause issues with the environment.

Explanation:

Reusability and environmental - friendliness are positive aspects. The idea that only older materials cause environmental issues is not a negative of materials technology itself. Materials reacting differently over time can lead to product failures, safety concerns, etc., which is a negative effect.

Answer:

Materials might react different over time.