The Week in Pictures: Toxic Industrial Sludge Covers Hungarian Villages, Solar Panels on the White House, and More (Slideshow)

A state of emergency has been declared in Hungary where four people are dead, 120 injured and six missing as torrents of red toxic sludge, the byproduct of bauxite refining for aluminum, burst from a containment pond and poured through six villages in three counties.

In other environmental news this week, the White House has announced that solar panels will be installed on the White House living quarters by spring 2011; a Volkswagen Passat BlueMotion has recently set a new Guinness World Record for the "longest distance traveled by a standard production passenger car on a single tank of fuel"; and in Papua New Guinea, researchers have recently disclosed discoveries from a two-month long expedition, in which they happened upon over 200 species never before recorded -- including a tube-nosed fruit bat. Find out what else made headlines this week in our photo roundup of the most popular stories from around the globe.

Tags: Animals | Hungary | Oceans