Question

1. in figure 4 you can view the data collected from ice cores for the carbon dioxide concentration in the earths atmosphere since the year 1000 ad. what do you think is the major cause of the recent increase in carbon dioxide concentration? why? scientists can drill ice cores in the north pole and in other large land - glaciers to measure the carbon dioxide bubbles trapped in the ice for hundreds, sometimes thousands of years. figure 4 atmospheric carbon dioxide from law dome ice cores

Explanation:

The major cause of the recent increase in carbon - dioxide concentration is the burning of fossil fuels (coal, oil, and gas) for energy in industrial processes, transportation, and electricity generation. Deforestation also plays a role as trees absorb carbon - dioxide, and their removal reduces this natural sink.

Answer:

The burning of fossil fuels and deforestation are the major causes of the recent increase in carbon - dioxide concentration in the Earth's atmosphere.