Because major environmental actors (big NGOs...) are mostly engaging in a PR exercise to incite fear into our collective lizard brain. As Attenborough said: "saving our planet is now a communications challenge"

Linking Climate to life-threatening scenarios like Hurricanes (that hit you in-your-face) and food crisis, are more apt to rattle us into panicky action.

Slow, inconspicuous, decades-in-the-making ill-health (but not sudden death) inducing chemicals in our water, air and food will never make it through our current processes of media and political decision-making.