Choose the options that best complete the passage.
In 2018, a study by United Nations revealed that slightly more than half of the world’s population (55%) lived ___(1)___ cities and this number is likely to ___(2)___ to more than 60% by the year 2030. ___(3)___ more people move to cities, the level of pollution there reaches alarming ___(4)___. City councils are ___(5)___ efforts to improve this situation, for example, by ___(6)___ more trees, investing in parks and other green spaces, or ___(7)___ citizens to practise recycling. Individuals should also do their part by ___(8)___ a greener lifestyle. These include saving energy, using ___(9)___ transport, walking and cycling more. If each individual does their part, they can help ___(10)___ the planet from becoming more polluted.