Scientist warn 1 billion on track to die from climate change.

It's not actually junk prediction, though you might call it doom-bait journalism. WHO put climate change related deaths at like 150,000 people annually in the year 2000. Those numbers will obviously go up, which is why they're backed in a lot of studies, but the real rub on reporting here is that they're talking about "over the course of a century". So it's a completely reasonable estimate, it just ignores a lot of nuance like "some countries are having higher population growth so we're not going to just lose 1 billion (though these deaths are theoretically preventable)" but also "the vast majority of these deaths will be concentrated in Southeast Asia and poorer countries."