While fossil fuel energy represents the most common class of power generation, solar power just made a big leap forward, hitting 46 percent efficiency. Trace runs down the details and sees how the breakthrough stacks up against other power systems.
Nuclear power delivers about 19 percent of energy in the United States, and while it has many pluses, its waste and potential meltdown issues still make some people nervous. Julian explains how molten salt reactors might be the best nuclear option.
Although the list of countries that have nukes is not a terribly long one, their presence anywhere can give people mushroom-cloud nightmares. Trace examines the small, confirmed, nuclear club and a few other countries that may be close to joining.
The Japan Meteorological Agency said a local tsunami of up to one metre (3.3 feet) could impact the Pacific coastline after the quake.
Two MIT engineers have designed a better reactor, one that deals with the industry's biggest problems: waste and safety.
Nuclear power may bring with it tons of efficiencies, but as in most things, there's no free lunch. It also makes waste, and weekly curbside collection just won't cut it for this class of garbage.
Wall will block groundwater from nearby hillsides that has been flowing under the plant and mixing with polluted water already there.
Tech does double duty this week, as we look at floating gardens that clean rivers, houses that produce oxygen and drones that create a Wi-Fi network.
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