<span>Their progress and wealth is highly dependent on the harvests, and
the price of grain. They probably have to import some industrial
products and if they had a bad year (weather, other catastrophies, poor
technology) they can't get the necessary amount of industrial products
in exchange for their surplus e. g. in grain. </span>
Because Earth's outer core is liquid and S waves cannot travel trough liquids
We should care about the earth every day, not just on a singular day. though it is a great thing to celebrate! the earth has given us so much and we should be more thankful and take better care of everything.
Theres 3 types of climates there arid, semiarid and temperate
