This stuff is very sad indeed. I spend a lot of time in India in my younger years and saw stuff like this all the time. I'm a nurse and I started my career at a Pediatric ICU where I saw some pretty awful things that adults did to kids. I have a strong sense of wanting to right wrongs.. .
but here's the thing. We can only do so much. We can be angry and sad and have empathy and feel helpless, and the helplessness will send us (at least me) into a depression and steal the joy from the lives and blessings we have, be they big or small. This stuff will eat us up.
I learned many years ago that we can't fix the world. We can't fix other people's problems if they don't want to change either (such as a dear friend who is alcoholic and doesn't want to change). You have to just pick a couple of things within your sphere of influence and make the world a better place in ways that you can. It might be volunteering locally, fostering homeless pets, being a listening ear to someone in need-- and praying.
I am not a religious person so my prayers are not formal. It's more like sending heart-hugs to people and animals and the earth, and I think that even those prayers/thoughts/heart-hugs can help.