Answer:
d. reduction in secondary pollutants
Step-by-step explanation:
- Global warming is a large scale rise in the sea level and the third-degree warming of the planet by the drastic and server climate changes that take place on the earth.
- The fact that secondary pollutants are indirectly related to the event of global warming on the earth and the direct effects are seen from the rising sea levels, intense droughts, and more frequent hurricanes.