Answer:
78100,000,000.
Step-by-step explanation:
78100,000,000 50-year-old trees are needed to capture 1,562,000,000 metric tons of carbon dioxide that were released in the year 2014 to produce electricity from coal in the United States of America alone if each tree captured or consumed 0.02 metric tons of carbondioxide gas per year. This value get when 1,562,000,000 is divided by 0.02.