Which gas accounts for the largest percentage of greenhouse gases in the atmosphere? O carbon dioxide
O nitrous oxide
O water vapor

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time

Based on anatomical similarities, to which modern animal is dr. digger’s creature most closely related?

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic