The Bolsheviks revolted and took over Russia, killing the royal family and starting a new government. While doing so, they surrendered large parts of their land to Germany, including Poland. After the Russian Revolution occurred in 1917, Germany no longer had to fight a war on two fronts, and was able to shift a large portion of their army from the East to the Western Front.
Pressurised force causes to form metamorphic rocks
Altitude because the higher up the colder the temp. And the higher up the less oxygen so the altitude would be a temp changer between fort William and Plymouth
Answer:
Using fossil fuels in factories, less people out using cars (so less exaust) and also less trash in waters so the evaporated water isn't so full of bacteria.
Explanation:
IDK if this is what you are looking for but, less bacteria and smoke and fossil fuels go into the air making the air cleaner.
I'm open to questions.
