Your health. Your family's health. The health of your community, country and planet.
These are huge issues and crunch time is coming. In many ways, crunch time is already past.
So, choose your principles carefully, but be aware that you have made a choice, an ethical decision, and that other people have a right to different ethical decisions and about their choice of principles.
Make your ethical decisions on the basis on well-informed, balanced science not ignorance, especially wilful ignorance (refusing to examine inconvenient scientific evidence); fact, not fiction; a view to the future building on the evidence of the past and present.
Then act consistently with your principles, realizing that having more than one principle can, in certain circumstances, lead to a clash of principles. But always act. Take a step towards a better future, even a small one.