I think you are wrong calling the issue of climate a buzz word. Humans may not able to stop climate change just as human is unable to stop COVID-19 and some other viral diseases. But the fact is that the adverse effect and consequence on human livelihood can be mitigated. And scientist are trying every means to achieve this.
So, calling it a buzz word is a misused of words on it own.
RE: Hydroxyapatite: An Environmentally friendly nano-based alternative for enhancing crop production under climate change scenario.