a remote community desperately needs more electrical energy. it is located in an area with the following characteristics:

average wind speed of 0 – 5 km/hr
some medium-sized rivers with fast-moving currents
few coal deposits
rain and cloudy on many days of the year

based on the above information, which energy source would be the most economical and safest for the community to pursue?
a. wind
b. hydroelectric
c. solar
d. fossil fuel

Based on the above sources, the most economical to use is the hydroelectric, since there is a fast-moving current in the river. Also, it is the commonly used energy-generation process. For wind turbine, it would require a minimum of 8kph to power the wind turbine, in this case is not sufficient. Coal deposit is not likely an option because this has some environmental concerns. Solar is not also an option since the village frequently has rainy days.

The troposphere gets warmer as altitude increases.