It is about 700 km<span> (435 mi)</span>
Gravel in the soil helps crops grow better, since they provide nutrients. Sand however, doesn't impact the crops growth at all.
The correct answer is D. gross national product. (I took the test)
Brussels is the capital of Belgium, and Belgium is a country in North-Western continental Europe (only "north" if you don't take into account the Scandinavian Peninsula). It's located between Germany and France.
Within Belgium, Brussels is located in the middle of the country.
Fossil aren't the only cause of global warming. Many human activities are causing global warming. Most come from the combustion of fossil fuels in cars, factories and electricity production.
Hope this Helps!