Problem 4
Volcanic events, such as the eruptions of El Chichón and Mount Pinatubo, have been associated with drops in global temperatures. During the Cretaceous period, volcanic activity was associated with global warming. Explain the apparent paradox.
Problem 6
Motor vehicles are a significant source of \(\mathrm{CO}_{2}\). Using electric cars, such as the one pictured here, is one way to reduce emissions from this source. Even though these vehicles emit little or no \(\mathrm{CO}_{2}\) or other pollutants directly into the air, can they still be connected to such emissions? Explain.
Problem 7
The present epoch, the Holocene interglacial, will eventually end with a return to glacial conditions. So why is there great concern about global warming and an increase in atmospheric temperatures?
Problem 9
This large cattle feedlot is in the Texas Panhandle. How might consuming less beef influence global climate change?
