A student researching cities has taken notes:
• More than half of humanity now lives in urban areas • Cities account for about 70% of global carbon emissions • Urban heat islands make cities warmer than surrounding areas • Green infrastructure can reduce temperatures and improve air quality • Smart city technologies optimize resource use
The student wants to highlight cities' environmental impact.
More than half of humanity now lives in urban areas.
Cities significantly impact the environment—generating about 70% of global carbon emissions and creating urban heat islands that raise local temperatures.
Smart city technologies help optimize resource use and reduce waste.
Green infrastructure can reduce urban temperatures and improve air quality.
Correct Answer: B
Choice B. 70% emissions and heat islands show environmental impact.