Fill in each blank space in the passage below with the most appropriate word
The environment is ___1___ greatest treasure. We must take ___2___ of it to ensure that future generations ___3___ also enjoy its benefits. Trees play an important ___4___ in our lives.
They provide us ___5___ oxygen and help purify the air we breathe. Trees also ___6___ soil erosion by holding the soil together with their roots. Many animals ___7___ on trees for shelter and food.
Unfortunately, many people have been ___8___ down trees without planting new ones. This has ___9___ to serious environmental problems such as drought and flooding. We should all ___10___ part in tree planting activities.