Over the past two hundred years, cities around the world have grown. the rapid population increase and industrialization of urban areas have, in turn, had a great impact on the local environments.

urban governments have been concerned with all but one of the following environmental problems. that is
a) contaminated run-off.
b) reduced precipitation.
c) insufficient garbage collection.
d) air pollution from factories and vehicles.

The answer is B. reduced precipitation

Explanation:

Urban governments have been concerned with all of the listed environmental problems except reduced precipitation. At this time, drought is a world-wide concern.

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation: