The encyclical letter Laudato Si is available here on the Vatican website. Pope Francis criticizes those who defend the environment, but not human life:
136. On the other hand, it is troubling that, when some ecological movements defend the integrity of the environment, rightly demanding that certain limits be imposed on scientific research, they sometimes fail to apply those same principles to human life. There is a tendency to justify transgressing all boundaries when experimentation is carried out on living human embryos.
The pro-life principle, in brief:
We forget that the inalienable worth of a human being transcends his or her degree of development. In the same way, when technology disregards the great ethical principles, it ends up considering any practice whatsoever as licit. As we have seen in this chapter, a technology severed from ethics will not easily be able to limit its own power.
A proper and holistic approach to ethics will be one suitable check on those addicted power.