Giúp mk vs mn ơi. Urban trees are especially important becase for many people they provide the only daily (1)______with the natural world. What's (2)______, urban trees also provide a home for birds, small animals and butterflies.Without the trees we would lose the pleasure of seeing these creatures in our cities. Regrettably, however, trees in cities are now coming under (3)______. There is a limit to the level of pollution they can put up with and, down at street level, their roots are being seriously disturbed by the digging needed to make way for modern telephone, television and other cables.