Advertising can be a powerful tool, companies use it as a marketing medium. Politicians use it for blatant to mild campaigns. I have heard this many times from sales people: People are emotional buyers. They could be quoting some famous marketing guru I may not be aware of, but yes, I believe that is how many people are. And when an ad hits the emotions of people, it becomes more powerful.
Below is an ad touching the emotions of people to think of our innocent children of the future generation. And the life they may live if global warming will be a major problem of the future. Thus pushing us to take action today.
The next ad below is against movements trying to stop emissions of CO2 or carbon dioxide. Stating that it is a part of our lives and provides many of the conveniences in life. And basically plant life needs CO2 for them to live and exist. Which in return emits the oxygen we breath.