What concern scientists the most about global warming are the risks that the polar ice caps will melt, the seas will grow too warm to sustain marine life, and that violent weather patterns may result.
What is important here is the plural word -'concern ' hence the verb 'are' is correct here.
The next thing we should be looking for if the list is parallel and this parallel structure can be best established per below:
- are the risks:
----that the polar ice caps will melt
----that the seas
...
What is important here is the plural word -'concern ' hence the verb 'are' is correct here.
The next thing we should be looking for if the list is parallel and this parallel structure can be best established per below:
- are the risks:
----that the polar ice caps will melt
----that the seas
...
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