by Jennifer GONZALEZ COVARRUBIAS MEXICO City (AFP) — Mexico City businesses warned Tuesday that traffic restrictions have cost them more than $300 million since April as authorities banned nearly half of vehicles again due to high smog levels. It was the second time since last month that the government kept 40 percent of the city’s 5.5 million vehicles off the streets because air pollution exceeded acceptable limits. The government imposed temporary rules on April 5 […]