countriesafrican namibia has a plan to ween itself off of expensive electricity imports from nearby south africa. it has renovated the national grid to help make people homes into power-production systems. >> the potential is up mostly in namibia, solar energy, wind energy, and biomass energy. >> the government was to have a significant amount of the country's energy coming from this by 2020. >> our target is 10%. >> getting small producers into production has only recently become possible. it is the first country in africa to create both a new l ones. an electrical grid like this one can take power from many different sources, anywhere in the system. the architect installed this to reduce its own electricity costs and also to show his clients what is possible with the new technology. >> it is a very smart investment because the payback of this investment will be between six and eight years. also, smaller consumers could be helping out, and the system, by putting that in the grid, we would not have to import that much energy from south africa because we could be a lot more self-suff

in the country of namibia, exposed rock faces suggest processes 600 million years ago that created an unimaginable world, bringing new meaning to the term "ice age," where glaciers flowed worldwide and the tropics were more like the poles -- a time known as the snowball earth. hoffman: during the maximum cold of the snowball earth, the mean annual global temperature is minus-50 degrees celsius. the ocean is frozen over and so you have a solid-surface planet. so you now have an earth that's more like mars than it is like earth. narrator: geologist paul hoffman's research centers on the question of what happened to create this planetary deep freeze a freeze that opens a lot of questions about how the earth maintains a habitable climate even today. hoffman: this only really became a question in the middle of the 20th century, when people realized that over the 5 billion years of our solar system, solar radiant energy has increased by almost 30%. so it's surprising, therefore, that the geological evidence indicates that the surface temperature of the earth hasn't changed very much over at

in the country of namibia, exposed rock faces suggest processes 600 million years ago that created an unimaginable world, bringing new meaning to the term "ice age," where glaciers flowed worldwide and the tropics were more like the poles -- a time known as the snowball earth. hoffman: during the maximum cold of the snowball earth, the mean annual global temperature is minus-50 degrees celsius. the ocean is frozen over, and so you have a solid-surface planet. so you now have an earth that's more like mars than it is like earth. narrator: geologist paul hoffman's research centers on the question of what happened to create this planetary deep freeze, a freeze that opens a lot of questions about how the earth maintains a habitable climate even today. hoffman: this only really became a question in the middle of the 20th century, when people realized that over the 5 billion years of our solar system, solar radiant energy has increased by almost 30%. so it's surprising, therefore, that the geological evidence indicates that the surface temperature of the earth hasn't changed very much over

namibia is suffering the worst drought in 30 years, with women and children bearing the brunt. the country's president has declared a state of national emergency. at the vatican, pope francis continued urging catholics to reject consumererism. again this week he said wealth doesn't bring true happiness. some conservative catholics are voicing concern that francis doesn't spend enough time publicly condemning abortion. but prominent boston cardinal, sean o'malley, defended the pope. saying the emphasis on loving compassion provides the context for the church's stand against abortion. he said quote, we oppose abortion, not because we're mean and old-fashiod, but because we love people and that is what we must show the world. we have a report today on the ethics of genome sequencing. finding out a child's entire genetic makeup. that could reveal defects that might cause disease or disabilities later in life. but should doctors tell parents everything they find out? would parents even want to know? lucky severson has our story. >> this is liam, everybody likes liam. hard not to, th

assisted by the south african peace parks foundation, the 5 african countries of angola, botswana, namibia, zambia, and zimbabwe agree in august 2011 to create the kavango zambezi transfrontier conservation area. called the kaza park, it is 29 million hectares, an area about the size of italy. this new plan creates a framework to protect and share these nations' precious water resources and combines the interests of wildlife and people toward a common goal. >> the big objectives of the tca and of the peace parks foundation is to facilitate a process where you look at the management of integrated ecosystems across international boundaries. >> the foundation is a facilitator for a dialogue between all of the stakeholders in the region. >> we hope governments in each of those countries initiate a process where you bring together private sector, communities, and government around one time and say, "ok. what do you think is the future of this area?" >> this integrated approach to conservation is vital for semiarid countries facing the combined challenges of food and water security at a time of

number 3, chris, at home on namibia's skeleton coast.keeping wildlife and visitors safe. >> number one is a guide you've already seen in action, but he's worth a second look. every time my wife and i visited the shamwari game reserve, jason always has something new to show us, and this time was no exception. >> back at shamwari, we headed into the bush once again with the intrepid jason. back in africa. how ya doin'? jason promised us an even bigger thrill than the cheetahs we'd seen last time. >> wherever you're comfortable. >> white rhino had been reported nearby. with any luck, we'd catch up to it before too long. when we turned the nt corner, there it was, right in the middle of the road. >> we're gonna to use the vegetation. and we're a also goa get the wind into our favor. >> you gotta go in quiet. >> we tracked it to the local watering hole, being careful to stay downwind of its sensitive and dangerous nose. wowee. look at this. we'd never felt so vulnerable, or so much a part of the animal kingdom. >> it's a new perspective when

that doesn't mean it is not a tripling consequence of a feat that was a mistake to do what we did in namibia the way he was executing that we may endure some responsibility is more urgent. third, although i thought he was a marvelous color and i've read a great deal of his work very closely and was impressed by it as yet a special connection to the united states he was a graduate of lincoln university in pennsylvania and donna was the first country in 1957 to accomplish and dependence that gave the black community a great deal of pride. . . and a now, it starts and moves forward and cuts us off from any access to african history, which was not what woodson in tended. and so, we obviously owe the value of our higher to those people who suffered so much and those who are descended from those people who worked for 246 years for nothing. we owed them something for that, but we owe them the story of themselves. we have been asked to expect that people can survive in good, sound psychological health, on ashes and obliterated history. when i was a child in richmond, virginia, weiss to have this phr