The concept of "pay what you want" for goods and services is a nostalgic throwback to the days when people trusted one another just a little bit more, and it's something you expect to see at the occasional farm stand or at a hip, independent coffee shop.
Reducing greenhouse gases and saving the polar bears tend to dominate discussions on climate change. But to the booming world population, one climate change issue may be even more pressing – hunger.
A new report by a leading international relief agency warns that climate change will increase the risk of large spikes in global food prices in the future, and lead to more hungry people in the world. That's because extreme weather like droughts, floods and heat waves are predicted to become much more frequent as the planet heats up.