Back in November, Facebook Inc CEO Mark Zuckerberg started a tradition of holding regular public town hall Q&A meetings, allowing people to ask him anything they wanted during a one hour livestream. This week, Zuckerberg held another public town hall meeting while attending the Mobile World Congress in Barcelona, Spain.

Some questions were light-hearted, such as the audience member who asked Zuckerberg if he could post more pictures of his dog (“I probably should”), but others were more insightful or serious in nature.

Here are some highlights from the Q&A.

Will Facebook to take up challenges like blood donations in the near future?

“One of the big types of social good projects that Facebook takes on are ones that require coordinating a large number of people,” Zuckerberg said.

He explained that Facebook is uniquely positioned to provide communication during disasters such as typhoons or earthquakes. He said, “The first thing you want to know if you hear that there’s been an earthquake or some natural disaster in a city is, ‘Are the people I care about ok?'” In the past, Facebook has created special pages during disasters that allow people to check in and let family members that they are ok.

Zuckerberg noted that blood and bone marrow donations also require good coordination, saying, “That is the kind of thing that we’d love to be able to help out on.”

How do you attract and select the right people to work at Facebook?

“I will only hire someone to work directly for me if I would work for that person,” Zuckerberg said.

He explains that he would be willing to work for any of the top-level staff he has hired, mentioning COO Sheryl Sandberg in particular. While the Facebook CEO does not make every hiring decision in the company, he points out that this philosophy works in multiple layers all the way down to the lowest level employees.

“If each person is only hiring people to work directly for them who they would work for,” Zuckerberg says; “Then you’re probably going to get a very strong organization.”

Does Facebook have any plans to work on something outside of internet technology?

“We’re pretty focused as a company,” Zuckerberg said. “There are lots of different ways that people share and want to communicate.” These include viewing studio-produced videos, sharing photos, messaging friends and family, and so on. Facebook, Zuckerberg says, can expand in many directions while still staying focused on its mission of improving mass communication.

As the people using the internet shift away from text and toward multimedia communication, Facebook will shift its focus with them. This includes, says Zuckerberg, Facebook’s work on virtual reality through Oculus, as well as Internet.org’s mission of spreading internet connectivity to developing nations.

He added, “Everything that we do really does tie back to this mission of trying to connect the world.”

How will you improve your process of taking some things off of Facebook and leaving other things up?

“The principle that we have when we think about this is we want to give the most voice to the most people possible,” Zuckerberg said. At a basic level, according to Zuckerberg, one of the biggest barriers standing in the way of this is the lack of internet access for many people.

He also points out that each country has its own laws about what types of content are allowed.

“When a country comes to us and says, ‘We want you to take down this piece of content,'” Zuckerberg said; “Ultimately, we review each one of those requests very seriously, and we make sure that any request that we get is in compliance with the laws that that country has.”

Zuckerberg noted that while Facebook may not agree with the censorship laws of some countries, it does comply with many of them because the alternative would leave people in that country without access to Facebook.

According to the Facebook CEO, this tradeoff is a necessary evil to provide people with important communication tools, but a more cynical view may say that the tradeoff keeps business booming and shareholders happy.

If you would like to watch Zuckerberg’s entire Q&A session, you can view it here.

Screenshot via Facebook