The environment of New York City consists of many interwoven ecosystems as part of the New York–New Jersey Harbor Estuary. The climate of New York City shapes the environment with its cool, wet winters and hot, humid summers with plentiful rainfall all year round. As of 2020, New York City held 44,509 acres of urban tree canopy with 24% of its land covered in trees.[1][2] As of 2020, the population of New York City numbered 8.8 million human beings.[3]