Conversation so far:
What environmental issues is Michael Bloomberg concerned about?
Bloomberg unveiled PlaNYC: A Greener, Greater New York on April 22, 2007, to fight global warming, protect the environment and prepare for the projected 1 million additional people.
What did Michael Bloomberg do about the Global Warming issue ?
During his second term as the mayor of New York City, Bloomberg unveiled PlaNYC: A Greener, Greater New York on April 22, 2007, to fight global warming.
Did Michael take any actions of other environmental issues besides attempting to address the global warming issue?
In October 2007, Michael Bloomberg launched the Million Trees NYC initiative, which aimed to plant and care for one million trees throughout the city in the next decade.

Question: Was the Million Trees Initiative successful?
Self-contained rewrite: Was the Million Trees Initiative started by Michael Bloomberg successful?