Answer: B
Explanation:
Fracking sites release a toxic stew of air pollution that includes chemicals that can cause severe headaches, asthma symptoms, childhood leukemia, cardiac problems, and birth defects.
Answer:
Agriculture allowed people to stay in one place, and increased food production caused the population density to expand far beyond levels that could be sustained by hunting and gathering alone. This growth in population density provided a critical mass of people to sustain and spread contagious infectious diseases.
Answer:
The orbital period of Earth in position A is greater than the orbital period of Mars in position B.
Explanation:
Since I cant see the diagram, this would be my best guess.
To address problems caused by the dissolution of the Soviet Union some Eastern European nations privatized industry, increased foreign investment, and joined the European Union.
So answers are A), B), and E).
