That effort has already begun. This year, TreeBaltimore, an initiative sponsored by the mayor's office to create public-private partnerships aimed at growing the city's canopy, oversaw the planting of some 6,700 trees in residential and business areas, up from 6,000 in 2009. Beginning in July, the program hopes to increase that number to 8,800, and officials want to be planting as many as 15,000 new trees a year by 2014. The tree-loving Lorax — star of the belovedDr. Seuss book and the movie that opened nationally last week — would approve.