The research I've done (North America only) indicates that temperatures, especially near the ocean and North pole, are rising, at a few hundredths of a degree per year. So the phenomenon is real.
I've also noticed that many technical conclusions presented in the media are absolutely wrong, and not supported by the data. This suggests to me that the conclusions are drawn for political reasons, out of a desire to increase government control over otherwise free economic activity.
To conclude that the temperature rises are manmade requires confidence in climate computer models; I have not seen that these models can predict accurately. Whether the rises are natural, due to CO2, dust and pollution, or cows is hard to determine.
Oil-producing countries will sell as much oil as they can; they will not leave easily-pumped valuable resources in the ground. Oil-consuming countries, especially developing countries, will not accept a lower standard of living than is desired, and will buy cheap oil. Therefore, we can preach a lot, but the world will burn oil until it is not profitable to do so. If mankind is heating the planet, this will continue.
As far as the US is concerned, I believe it is insane to send hundreds of billions of dollars to the Middle East, when we could be using the money to pursue alternative energy sources. Low-cost alternatives will stop the problem mentioned in the previous paragraph. If manmade warming is real, then alternative energy will help. If it's not real, alternative energy can still help prevent political and economic crises in the future.