When I was growing up, my parents were almost involved in various volunteer things. My dad was head of Planned Parenthood. And it was very controversial to be involved with that.

Newspaper readership is still growing in India.

If you're using first-class land for biofuels, then you're competing with the growing of food. And so you're actually spiking food prices by moving energy production into agriculture.

Certainly I'll never be able to put myself in the situation that people growing up in the less developed countries are in. I've gotten a bit of a sense of it by being out there and meeting people and talking with them.

Using the Internet to secure employment is as vital to a construction worker as it is to a software engineer.

Here is one iron law of the Internet: a social network's emphasis on monetizing its product is directly proportional to its users' loss of privacy.

At the very least, you must make the Internet free in areas that are poverty-stricken. Without the Internet and access to information, poverty-stricken households will never catch up to households above the poverty line - throwing the African-American community deeper into the stone ages.

With the world's human population now at seven billion and growing, and the demand for technology and modern conveniences increasing, we can't control all our negative impacts. But we have to find better ways to live within the limits nature and its cycles impose.