Richard Harris

This story is part of a two-part series about the presidential candidates' climate policies. Click Here For The Story About Mitt Romney

Both presidential candidates have all but ignored climate change during this election season. Mitt Romney would not make it a priority if he were president.

This story is part of a two-part series about the presidential candidates' climate policies. Click Here For The Story About President Obama

Neither presidential candidate mentioned climate change during their three debates — in fact, the issue is nearly absent from the entire campaign. That's because the issue poses challenges for each candidate.

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Let's take a look at alternative energy now. There's growing interest and investment in the process of extracting oil from algae and turning it into fuel for vehicles and airplanes. It requires a lot of water, nutrients and land. And a new report from the National Research Council says that will make it challenging to turn algae into a sustainable source of energy.

NPR's Richard Harris reports.

Scientists view climate change as one of the world's most pressing long-term problems. But the issue has barely surfaced in the U.S. presidential race. President Obama has taken steps to address climate change during his time in office. Republican challenger Mitt Romney would not make it a priority in his administration.

In fact, as Romney stood on the stage to accept his nomination at the Republican National Convention, he used global warming as a laugh line.

You wouldn't be surprised to learn that a laboratory run by the U.S. Department of Commerce is working on more precise methods to measure stuff.

However, you might not expect it to be at the cutting edge of the mind-bending world of quantum physics. But on Tuesday, David Wineland became the fourth employee at the National Institute for Standards and Technology, a federal lab, to win a Nobel since 1997. Wineland learned he will share the Nobel Prize in physics with Frenchman Serge Haroche for work that's both esoteric and practical.

On April 11 of this year, an extraordinary cluster of earthquakes struck off Sumatra. The largest shock, magnitude 8.7, produced stronger ground-shaking than any earthquake ever recorded. And it surprised seismologists by triggering more than a dozen moderate earthquakes around the world.

The quakes are also a sign of big changes to come in the Earth's crust.

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And I'm Renee Montagne.

Here's some troubling news. Ice covering the Arctic Ocean has melted more dramatically this year than ever before. This year's loss of ice has exceeded the previous record by an area the size of Texas. NPR's Richard Harris reports.

Arctic sea ice has melted dramatically this summer, smashing the previous record. The Arctic has warmed dramatically compared with the rest of the planet, and scientists say that's what's driving this loss of ice.

To be sure, ice on the Arctic Ocean always melts in the summer. Historically, about half of it is gone by mid-September. But this year, three-fourths of the ice has melted away, setting a dramatic new benchmark.

Mitt Romney outlined an energy plan Thursday that would guide his Republican presidency. It focuses heavily on expanding the supply of fossil fuels. The presumptive nominee said the U.S., Mexico and Canada together could reach energy independence by 2020.

But the plan makes no mention of climate change and would end subsidies for cleaner sources of energy, such as wind and solar.

Ten years ago, a piece of ice the size of Rhode Island disintegrated and melted in the waters off Antarctica. Two other massive ice shelves along the Antarctic Peninsula had suffered similar fates a few years before. The events became poster children for the effects of global warming. But a new study finds that the story isn't quite so simple.

There's no question that unusually warm air triggered the final demise of these huge chunks of ice. But a lingering question is whether these events can be attributed to human-induced global warming.

It may take some time to pinpoint the exact cause of India's massive blackouts last week, but the underlying issue for India and many other parts of the developing world is that supply is struggling to keep up with the growing demand for power — an imbalance that can affect the reliability of electric grids.

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You might think that Americans, renowned for consuming a disproportionate share of the Earth's resources, would feel the most guilty about using up those resources. Not so, according to a new study. NPR's Richard Harris reports on the latest findings from a National Geographic project called Greendex.

How much of the recent hot weather can be attributed to global warming? Scientists will no doubt dig into the data and grapple with that question in the months to come. They have already taken a stab at that question regarding some of last year's extreme weather events, like the drought in Texas.

Before we get to the fireworks on the Fourth of July, we might see some pyrotechnics from a giant physics experiment near Geneva, Switzerland.

Scientists there are planning to gather that morning to hear the latest about the decades-long search for a subatomic particle that could help explain why objects in our universe actually weigh anything.

The buzz is that they're closing in on the elusive Higgs particle. That would be a major milestone in the quest to understand the most basic nature of the universe.