Question

sources of carbon dioxide in the atmosphere
carbon dioxide is one of the greenhouse gases that helps keep earth warm enough to support life. increasing the carbon dioxide in the atmosphere increases the temperature. an investigation was done to determine the natural and human - made sources of carbon dioxide in the atmosphere. two tables were created to display the results.
human - made sources of carbon dioxide
source\tapproximate percentage
electricity and heat generation\t41
transportation\t22
industry\t20
residential\t6
other\t11
total\t100
directions: read the passage, analyze the tables, and answer the question below.
based on the data, what human - made source releases the most amount of carbon dioxide into the atmosphere?
transportation
ocean
plants and animals (respiration)
electricity and heat generation

Explanation:

Step1: Check the percentages

We look at the "Human - Made Sources of Carbon Dioxide" table. Electricity and heat generation has 41%, transportation has 22%, industry has 20%, residential has 11% and other has 6%.

Step2: Compare the values

Among these human - made sources, 41% (electricity and heat generation) is the highest percentage.

Answer:

electricity and heat generation