Do we? That's the one big thing that's an immediate, across-the-board threat to both human civilization and the environment as we know it. The "other environmental disasters impacting everyone on earth" are either partially caused by climate change, or aren't really disasters. Like microplastics - unless there's been some new research in the past year, AFAIK they're still just something worrying, but we're yet to identify any actual harm caused by them. Which means it's good to keep them on our radar, but dealing with them shouldn't be a priority - not when we have problems (like carbon emission induced climate change) that are directly harmful and are only going to get worse.

People need something easy to grasp, or they will flat-out ignore a topic. So news outlets pick out a simple, easily digestible factoid that can be measured - like carbon emissions. It's great! You can even calculate the "carbon footprint" of a single person. No matter that isn't correct anyway, as long as it makes you feel good when buying your electric SUV.