What do economists call the things that firms sell which cannot be touched or seen

The increase of pollutants from in mexico has raised concerns about garage to health and the environment

What forms of energy are involved when snow on a mountain breaks loose, resulting in an avalanche? during an avalanche, the( 1 ) energy of the snow on the mountain is converted into ( 2 ) energy as the snow cascades down. ( 1 ) a. elastic b. kinetic c. potential d. radiant ( 2 ) a. chemical b. kinetic c. nuclear d. potential

Compare the partition of southeast asia to the partition of africa how was it similar