Some rivers and seaports in Russia can freeze for six to nine months out of the year. Predict how this could affect trade and travel in Russia and how Russians may try to overcome this obstacle.

Central american countries are important agricultural producers. each year, the united states imports about five billion dollars’ worth of a. bananas b. cacao c. mangoes d. coffee

Which of the following policies is an example of a command-and-control policy? a. subsidies to education b. maximum levels of pollution that factories may emit c. tradable pollution permits d. none of the above is an example of a command-and-control policy.

What does one prolonged blast and one short blast mean?