[CHAPTER 8 – Food Resources] Producing enough food to feed the world now and in the future will require ____

[CHAPTER 7 – Geological and Land Resources] More than _____% of green, photosynthesizing leaves are found in Earth’s forests.

[CHAPTER 11 – Alternatives to Fossil Fuels]  The mass number of an atom is the _______

[CHAPTER 11 – Alternatives to Fossil Fuels]  A general rule says that after _____half-lives, radioactive material has decayed enough to be rendered safe.

[CHAPTER 10 – Air Quality and Climate Change] The goal of the 2016 Paris Agreement is to keep climate warming well below which threshold?

[CHAPTER 10 – Air Quality and Climate Change] Why are particles smaller than 2.5 µm the most dangerous?

[CHAPTER 10 – Air Quality and Climate Change] Which of these can be used by scientists to estimate past climates?

[CHAPTER 9 – Conventional Energy: Fossil Fuels] How do oil and natural gas occur in formations?

[CHAPTER 10 – Air Quality and Climate Change] How does climate change affect alligators?

[CHAPTER 11 – Alternatives to Fossil Fuels]  The EPA considers which type of energy to be one of the most efficient heating and cooling systems?