Oil is also considered to be one of the ________ which make the water unclean. (pollute)
Pollutants
When people can understand clearly the _______ impacts, they will be more aware of conserving forests. (environment)
Environmental
The threat of contaminated environment is becoming ______ serious. (increase)
Increasingly
Because of _______ , there may be no place for wild animals in the near future. (deforest)
Deforestation
The overuse of chemical fertilizers can lead to the decrease of soil ______. (fertilize)
Fertility
The ________ of ecosystem of lakes, rivers, seas and forests must be prevented. (destroy)
Destruction
_______ warming is said to be one of the reasons for polar ice melting. (globe)
Global
Air ________ can cause acid rain which damages water, soil and vegetation. (pollute)
Pollution
Because non-renewable resources are being consumed at a rapid rate, human beings are likely to face fossil fuel ________. (deplete)
Depletion
Working as a volunteer provides you with opportunities to know more about cultural ______ (diverse)
Diversity