Responsible stewardship in the coming decades will require global energy policies that promote both sustainability and technological efficiency. productivity and economic prosperity in developing nations. the development of abundant and inexpensive fossil fuels such as shale gas. additional exploration of shale oil and natural gas resources.

the median of the data is 4.

step-by-step explanation:

the median means the middle number of a given number.

to decide which one is the median, arrange in ascending or descending order. but sometimes, you may find two(2) number in the middle, but it's easy, just add them together and divide by 2.

so,   determine the median of the data. 2, 3, 3, 4, 5, 7, 9

it is already arranged, count 3 times forward and 3 backward and the one left is your answer.

2,3,3,4,5,7,9

our answer is 4.

hope this !

citizens were able to charge more for their goods and services