All plays into each other. Hence why it's called an "Ecosystem". - The more CO2... The more evaporation, the more water in our atmosphere, the more heat that is trapped.
It's easier for people to understand how everything is connected in some way, when your knowledge is spread out and your capable of doing more than just 'a few things'. Not that long ago, people were taught more so in a way to be a jack of all trades, yet today, people are taught to be really good at one or two things, and not taught anything else, because they are told they don't and shouldn't need to. When all you know are a few things really well, trying to understand how and if everything else fits together seems more complicated. It makes the world more efficient in terms of business, but things like science, politics, law, etc, really pay the price because of this.
After spending a lot of time in the renewable energy industry, I don't think we should just blindly keep pumping out CO2 and assume it will never become a more serious problem, because while the greening of Earth is good in some ways, its dangerous in others. More plants to absorb CO2, but also release it, more food for people to eat, but also more things like ticks carrying lyme disease, spread far beyond the places they inhabit now. While more CO2 leads to more evaporation, so does the amount of sunlight itself. While we can't do all that much about blocking the sun, we can do something about CO2 output. Plus crude oil isn't exactly something we have an endless supply of, and we're going to need it for certain products longer than we will need it for others like gasoline.
I'm definitely a believer that we should try and cut back on CO2 emissions as much as possible without harming the economy too much, but I don't think we need to be freaking out on the level that some people do. Companies like Tesla with their cars and batteries are pretty much at the point where they've made enough of an impact that the world will end up following their lead. Many companies are already working up to that. I wouldn't be surprised if by 2040 every single auto sold worldwide is electric or hydrogen by then. Another 10 years of solar and storage improvements, and having affordable solar and battery packages for rooftops should start to become the norm, which also means the grid can shrink considerably and power plants can burn less fossil fuel. Hopefully by then we've come up with a cleaner mass power generation solution. Hydrogen would be the way to go if they can get the cost down but right now I believe it's around 4X, so they have a ways to go. There's also nuclear fusion, but I wouldn't count on that.