Excessive use of plastic can severely harm marine life and damage the __________. (forest/ecosystem)
ecosystem
Tourists should avoid littering in national parks to help __________ the natural beauty of these places. (waste/protect)
protect
The government is launching campaigns to reduce air pollution and promote a __________ lifestyle. (green/lazy)
green
Coral reefs are natural __________ that protect coastlines from storms and erosion. (wonders/machines)
wonders
A visit to natural wonders like Ha Long Bay can raise awareness about the importance of __________. (pollution/conservation)
conservation