1. Why have many cities across the country installed LED bulbs in their traffic lights? Be specific.

2. What major problems are the LED bulbs causing? Be specific.

3. a) What possible solutions are several states testing?
b) What is the drawback to these solutions?

4. How much money has the state of Wisconsin saved in energy costs per year?
NOTE: Total spending in the 2009 Wisconsin budget is approximately $52.4 billion. (from wikipedia.org)

5. In Minnesota, authorities are more than halfway to their goal of upgrading the state's traffic lights to LEDs. Officials there are experimenting with weather shields.
Drivers in cold-weather states have been complaining about the problem with the LEDs since the first ones were installed 10 years ago.
a) Do you think that Minnesota should install the other half of the state's traffic lights with LEDs before they find a solution to this safety issue? Explain your answer.
b) Should the concern over LED traffic lights outweigh the benefit of saving energy/money?  Explain your answer.
c) Ask a parent the same questions.