Q: What is already causing food and water shortages and species extinctions?


Read this paragraph and choose the correct option from the provided answers:

Adding more heat energy to Earth’s atmosphere also causes more extreme weather and changes in precipitation patterns. Global warming is already causing food and water shortages and species extinctions. These problems will only grow worse unless steps are taken to curb greenhouse gases and global climate change.

 Choices:

- urbanization

- immigration

- zero population growth

- global warming


A:
global warming