One challenge is to make materials that will allow us to start making smaller, lighter cars that can more easily be powered by electricity. LED lights are another big area in materials science right now. We need to develop materials that can use energy-efficient LEDs to produce the kinds of light we need at low costs. One last area to mention is reducing the amount of waste we produce in general. There are many approaches to reducing waste, and from a materials science perspective we would like to make products out of long-lasting, durable materials that can be repurposed or reused at the end of a product’s lifetime.