Question

The greatest threat to man’s existence caused by human changes to the environment is:



Choose the best answer from the options below:
A Toxic waste in rivers and lakes
B Increased carbon dioxide and less oxygen in the atmosphere
C Increased production of sulfur dioxide in the atmosphere
D Increased use of chlorofluorocarbons

Answer 1

The best answer from the options provided is:

B. Increased carbon dioxide and less oxygen in the atmosphere

This choice highlights the impact of climate change, driven primarily by increased carbon dioxide levels due to human activities, which poses significant threats to human existence, including rising temperatures, extreme weather events, and sea level rise.