During the summer months, buildings in Helsinki, Finland- a country that draws over 34 percent of its energy from renewable sources- (is/are) cooled by an artificial underground lake that contains nine million gallons of icy water.

Are

Explanation:

According to subject verb agreement rule of grammar, Singular subject should take singular verb and plural subject should take plural verb.

For example boy is eating apple--

boys are eating apple

In the sentence mentioned above first we have to identify the subject to which  is/are should agree with

subject is  Buildings in Helsinki which is a plural noun and hence are is the correct verb to be used with buildings.

the dictionary definition of ubiquitous is "present, appearing, or found everywhere".

no, i never do because that’s not the reason for what i speak to or of.