I think that climate change is one of the greatest threat that our civilization (humanity in general) has ever had to deal with. In my opinion, I think it is utopic to think that in the short terms we will change our society so much to make it green and completely sustainable. It’s not just switching to electric cars and solar panels (of course this is a step that we have to overcome) but it’s a much bigger problem. First of all we have to change our economic system which is too much based on development and -most of all- on economic growth. Every year our governments try to push for more jobs, more production, more growth, more of everything. This happens because all the things we buy everyday are not made for lasting long and this is a gigantic waste of resources. Same for all the packaging. (We can all start by ourselves trying to buy more durable objects and try to use less plastic packages but I think that only governments can really solve the problem on a global scale)
This has to change and it’s going to take some time maybe 10 or 20 or even 50 years and politicia ns are going to have a really important role. We’re going to need strong politicians who will not sell our planet to some big corporation and every country in the world has to cooperate to achieve this task so important to everyone but at the same time governments cannot lower too much the standard of living because it will certainly lead to clashes or even revolutions. It’s a very complex problem and there are more solutions that need to be discussed at an international level.

I agree.  Personal actions are important both in the effect they have on emissions as well as raising consciousness in individuals and communities about the scale of the challenges we face.  Hopefully this change in consciousness will translate to national and international political action.  Because politicians are unlikely to take bold steps directed at long term solutions unless voters demand that they do so.

I agree too, the climate change is a "hot topic" at the moment: everyone talks about it, worrys about it and tries to understand how bad the situation is and how they can help. Like you said, personal actions are important, if we don't start to reduce our polluting emissions ourselves, surely we can not pretend others to do it, or even pretend the governments will do it for us. But since the population is already showing a real active interest towards this topic, I think that now it's the moment for influential politicians to  promptly intervent on the matter and make it more relevant.
I don't understand why the president of the United States, Donald Trump, one of the most influential politician in the world, "takes it so easy" on the climate change topic! When he's joaking on twitter about the global warming, I know he's not saying that it doesn't exist, but anyway he's damaging the seriousness of the issue, making it almost a joke. A lot of his followers are probably not leading a sustainable lifestyle, and by reading that their president doesn't really worry about the  problem of global warming, why should they? I mean, everone has their own head, but important politicians have a big influence on the way we see some aspects.
Concluding, yes, we totally need a new generation of politicians that worry about climate change and sustainable lifestyles, because at the moment, only a few are really engaged in the fight against global warming.