Answer:
The answers to the question are
1). 0.85 ppm
2). 1.28 ppm
3). 2 ppm
4). 1980 CO₂ concentration = 340 ppm
2018 CO₂ concentration = 407.4 ppm
Growth rate = 1.77 ppm per year
5). 407.4 ppm
Explanation:
1 1958 - 2004 = 0.6 ppm = 46 years
2004 - 2014 = 2 ppm = 10 years
Total average = (27.6 +20 )/56 = 0.85 ppm
2. 0.6 ppm
3. 2 ppm
4. CO₂ concentration = 340 ppm in 1980 to about 407.4 ppm in 2018
an increase of about (407.4-340)/(2018-1980) = 1.77 ppm per yer
5. The most recent CO₂ concentration measured is 407 arts per million
