The reason why the Midwestern United States have a very fertile soil, but Canada doesn't, despite both of them being covered by glaciers until relatively recently, and both having the same age of soil, is the climate and vegetation.
Canada is much colder than the Midwest, its winters are longer, and the summers mild, while the Midwest has higher temperatures, prolonged period of drought, and seasonal rainfall.
Because of this, Canada has been covered by coniferous forests. They leave relatively little biomass, and also the climate is making the decomposition of the biomass very slow, thus resulting in relatively poor soil quality.
In the Midwest, the climate is perfect for the development of the grasslands. The grasses grown and die each year. They live a lot of biomass, and the higher temperatures contribute that the biomass decomposes pretty quickly, thus resulting in good quality soil.
Answer:
In the Middle Ages, spices that are now ordinary were rare imports from faraway places.
Explanation:
The central idea of the text can be defined by the excerpt above.
The text is explaining the process that Italian merchants had to go through in order to carry a expensive spice (pepper) from Syria to the fairs of Champagne, in France.
This is because spices were a very well-regarded and expensive product that could only be afforded by the wealthy at the time, since shipping methods at the time were primitive (slow ships, camels), raising the cost of these products to levels that would be hard to imagine today.
B. Distortions.
because distortions are anything that looks different on one thing, than it does for another thing. The fun mirrors in a circus are an example of distortion.
Marine Pollution involves the introduction into the ocean by humans of substances or energy that changes the quality of the water or affects the physical, chemical, or biological environment.
Chemicals and debris, the majority of which originates on land and is dumped or blown into the water, make up marine pollution. The ecology, the health of all living things, and global economic institutions are all harmed by this pollution.
In the modern world, marine pollution is becoming a bigger issue. Chemicals and rubbish are the two main sources of pollution in our ocean.
Chemical contamination, often known as nutrient pollution, is problematic for the environment, human health, and the economy. This kind of pollution happens when human activities, particularly the application of fertiliser on farms, cause chemical runoff into waterways that eventually empty into the ocean.
Learn more about marine pollution here
brainly.com/question/23722171
#SPJ4
