Answer:
Population.
Explanation:
U.S., India, and China, are the areas of heavy emissions of carbondioxide gas due to areas of dense population. These three countries have about half of the world population i. e. approx. 3 billions of people so vehicles and industries are high in number which releases the greenhouse gases such as carbondioxide and carbonmonoxide while heavy emissions of carbondioxide gas occurs from Germany because there is huge number of industries are there so that's why it is called the industrial heart of Europe.
It's more Southwest of South Korea but yeah it's South it's also East of Hong Kong
The one in the east is the Andes mountains the one in the west is the Rocky mountains.
Dig underground, not fall for imagery. Look for plant roots, and animals meaning nearby water source.
