Broadstrokes: world hunger

There are 1.02 billion undernourished people in the world today. That means one in nearly six people do not get enough food to be healthy and lead an active life. Hunger and malnutrition are in fact the number one risk to the health worldwide — greater than AIDS, malaria and tuberculosis combined. Among the key causes of hunger are natural disasters, conflict, poverty, poor agricultural infrastructure and over-exploitation of the environment. Recently, financial and economic crises have pushed more people into hunger. As well as the obvious sort of hunger resulting from an empty stomach, there is also the hidden hunger of micronutrient deficiencies which make people susceptible to infectious diseases, impair physical and mental development, reduce their labour productivity and increase the risk of premature death.

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Your hybrid car might not be so green

So it turns all those hybrid car owners who turn their environmentally conscious noses up have an unexpected caveat to their green-ness--their cars are sucking up rare earth metals at a disturbing rate. Rare earth elements take up 17 slots on the periodic table, and are named not for their overall scarcity (they're actually quite common in trace elements throughout the Earth's core) but for the relatively uncommon minerals in which they were originally found; few rare earth elements exist in pure elemental form naturally.

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