Sound must move through matter. how is light different

For one week be an inventor and write down ideas for products or services that you think should be produced

Which of these is a drawback of using natural gas? a. it is fairly safe for use in homes.b. it burns more cleanly than crude oil products.c. scientists have developed new ways of extracting it.d. during its extraction, groundwater can be contaminated.

One reason that madrid became the capital of spain is because of its