Air. If you read reports from the past decade, you will find that the air quality in china is so poor that people have to put a mask on just to walk outside.
Answer:
um can you show us the choices
Explanation:
Answer:
Explanation:
The formula for apparent brightness is given by the next inequation:
Where B equals apparent brightnes, L equals luminosity and D equals distance.
SO we just have to clear distance from the formula and are left with the inequation to calculate distance:
Answer:
A divide between noble and peasant social classes is found in forager societies
Answer:
91%
Explanation:
As per the given pie chart, Non-Renewable sources include Coal, Nuclear power, Natural gas, and Petroleum.
Percentage of Coal = 52%
Percentage of Nuclear power = 16%
Percentage of natural gas = 20%
Percentage of Petroleum = 3%
∵ Total percentage of non-renewable sources of energy = Coal + nuclear power + natural gas + petroleum
= 52% + 16% + 20% + 3%
= 91%
While the other 9% is renewable energy including 7% Hydropower and 2% of geothermal, wind, solar energy, etc.
Thus, 91 % is the combined percentage of US energy produced by all of the nonrenewable sources.
