Using Subordinating Conjunctions 2: The following complex sentences are missing subordinating conjunctions. Identify the subordinating conjunction that would best complete each sentence by filling in the blank. - 1. ________ awareness of environmental pollution has increased, people have become more concerned about the damage caused by pollution.

Using Subordinating Conjunctions 2: The following complex sentences are missing subordinating conjunctions. Identify the subordinating conjunction that would best complete each sentence by filling in the blank. - 2. ________cars are a major source of pollution, people are buying more cars than ever.

Using Subordinating Conjunctions 2: The following complex sentences are missing subordinating conjunctions. Identify the subordinating conjunction that would best complete each sentence by filling in the blank. - 3. A clean-running car is beneficial _________it will reduce pollution significantly.

Using Subordinating Conjunctions 2: The following complex sentences are missing subordinating conjunctions. Identify the subordinating conjunction that would best complete each sentence by filling in the blank. - 4. ________ the search for a low-emissions car began in the 1960s, scientists tried using many different power sources.

Using Subordinating Conjunctions 2: The following complex sentences are missing subordinating conjunctions. Identify the subordinating conjunction that would best complete each sentence by filling in the blank. - 5. Researchers used fuels such as hydrogen and electricity _______ gas and diesel fuel could be eliminated.