I would not say that global warming is the BIGGEST threat to our planet. There are other issues in our world that pose larger threats. Terrorism is something that every country fears simply because of the impact it has had on societies in recent years. Global warming has not had as major an effect on countries and though a slight problem, will not have any major effect on our planet for hundreds of years. For now, we do not have the technology eliminate global warming, and we will not have the technology to do so for many years, so it is pointless to worry about something we cannot control now when there are much larger threats to our world now that we can deal with.
Okay... In regards to how we should improve our living conditions, we SHOULD be trying to use less greenhouse gasses and moving towards more reusable energy. We are currently in a stage of moving towards more reusable energy but it is expensive, and when we are faced with potential nuclear warfare, reusable energy is not the priority. If nuclear warfare were to break out, there would not be a human race left for global warming to effect. That being said, we cannot consider global warming to be the biggest threat to the world.
What are you asking? What is "it"? Are you referring to reusable energy, or are you referring to the nuclear warfare issue? Please don't just answer "Yeah" please give me a specific point of discussion.