4. Which challenges prompted New York City to take these actions? * In 2015 the New York City Mayor's office reported that the city
had recently accomplished the following:
Reduced carbon emissions by one-fifth and achieved the
city's cleanest air in 50 years
Upgraded building codes to prepare for extreme weather
like flooding and high winds
Added nearly one million trees and six million square feet
of reflective rooftop to the city landscape
a. increasing threats to large urban areas by foreign and domestic terrorism
b. a widening gap in income levels between socioeconomic groups in society
c. escalating costs of providing health care and social services for senior citizens
d. Aging infrastructure and pollution caused by high population density