Urban sprawl is a possible cause of deforestation.

Yes, the given statement is true. Urban sprawl is a major cause of deforestation. If cities are spreading, then people will need more space to live, so they cut down trees to clear space for living, it will ultimately lead to deforestation.

Although it has its own benefit as it is creating local economic growth, besides that it causes a negative impact on the environment such as air pollution, loss of biodiversity, increased traffic, loss of agriculture capacity etc.

your answer is "the 1950's"