How has Mexico City's government tried to address its air pollution problem? A.
It has built water sanitation plants in the city.

B.
It has limited mining in the mountain regions.

C.
It has banned planting trees around the city.

D.
It has restricted the use of automobiles in the city.

Why was charliemagne hesitant about being crounded holy roman emperor?

In 1990, the average income for an american worker was $1,518 per month. in 2000, the average income for an american worker was $2,632 per month. during this time period, a basket of necessities (food, housing, etc.) increased from $657 per month in 1990 to $1,402 per month in 2000. the real value of income ▼ increased decreased over that 10-year period.

Mrs. walter’s husband died in 2016. she has not remarried and has maintained a home for herself and her dependent son, whom she can claim as a dependent. in the summer of 2018, the son was killed in an automobile accident. what is mrs. walter’s filing status for 2018