Did you read the full article? They give a detailed explanation of why the project is controversial.
You might agree, you might disagree, you might want to sit on either side of the controversy, but the article substantiates quite well the usage of the adjective "controversial" in the title.
You might agree, you might disagree, you might want to sit on either side of the controversy, but the article substantiates quite well the usage of the adjective "controversial" in the title.