By and large, it seems they mean:
Safe: We will be safe from repercussions and consequences of our actions
and
Effective: This will be an effective way to reach our goals of causing harm, earning money through “treatments” for the harm we’ve caused, and lowering the population of the planet.
I have been making sunblock for my family since my firstborn was a baby more than thirty years ago. We spent many hours at the beach, when one can definitely get a sunburn. Otherwise, it is not necessary in daily out-and-abouts.
BTW, the recipe is: 7:2:1, by volume, of coconut oil, beeswax and zinc oxide. One can substitute the coconut oil with almond or olive oil. Melt it all together and stir well. We even made skin-toned block by adding cocoa. Side note: I used the 'block' to prevent nappy rash as well.
This is awesome, thank you for sharing this! I wish there was a book with all these natural remedies! I will be making some this summer!