Why is air pollution bad in mexico city?

How would lincoln's assassination change the direction of reconstruction? the radicals used this opportunity to take control of the plans. the south refused to cooperate with any plans after lincoln his death would put an end to all reconstruction plans. lincoln was too weak to carry out his plan and now it could be carried out.

(05.04 mc) how did the roman transportation system keep the empire strong? plz

The first settlement created by the pilgrims in 1620, came for religious freedom. i'm failing history