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Take a waste product like cow manure or trash, let it decompose for a bit and you’ll soon end up with methane gas. Methane is powerful contributor to climate change. But it can also be captured and used to make renewable electricity. That’s something farmers are experimenting with across California. But by solving one environmental problem, they’re running headlong into another. Lauren Sommer has more.

Cell phones, refrigerators, WiFi and your desk lamp: Just like anything you plug into the wall, they all emit EMFs -- electromagnetic fields that vary in strength and design. Communities are scuttling plans for microwave communication dishes in their neighborhoods, citing health concerns about EMFs. Fairfax is just the latest city to put a moratorium on "smart meters" - which transmit energy information wirelessly. So what are EMFs, and how do they affect us?

This is the classic environmental story: a species in trouble because of what our species is doing. It's happening all over the world. But there are people tackling these problems one by one, coming up with simple ways of changing our behavior. This week we take a look at the plight of the foothill yellow legged frogs.

Indian reservations hold an estimated 10 percent of the nation's renewable energy resources -- hot, windy tracts that suddenly seem more valuable than ever. The Campo tribe, near San Diego, has taken the lead, building the country’s only utility-scale wind installation on Indian land. Plans are afoot to triple the project. But tribe members say tax incentives and other federal programs put Indians at a disadvantage.

This week, we continue our series "33 by 20," a look at California's ambitious renewable energy goals. Solar and wind power are booming across the state. But renewables have a downside: there are times when the sun doesn't shine and the wind doesn't blow. That variability causes problems on the state's electric grid. So, California utilities are looking to smooth out those bumps with a new strategy: storing electricity.

As the state dries out from a long, rainy winter, the battle over water rights in the Sacramento Delta continues. Water contractors are hoping an upcoming court ruling will find that water pumps are not the only threat to the imperiled Delta Smelt. Some of the blame is getting pinned on a bigger fish that happens to have an appetite for endangered species. Alison Hawkes reports.

Researchers at UC Davis are collecting DNA from dogs seized in police raids on dogfighting operations. The goal is to create a database to help identify and prosecute the extensive underground breeding programs that sell puppies for as much as $50,000 to dogfighting rings. But the database is controversial among some animal rights activists, who believe it would allow shelters to euthanize dogs whose DNA match fighting lineages.

In April, California continued its ambitious efforts to restore declining ocean fisheries by creating 21 new marine protected areas between Half Moon Bay and Mendocino County. In all, fishing would be banned or reduced in 20 percent of state waters there. But with the state budget crisis, how will California enforce these rules?

California has set ambitious goals for a transition to clean, renewable energy: 33 percent by 2020. Some are skeptical that the goal is within reach.QUEST and Climate Watch continue to examine the promise and pitfalls of this historic transformation. Craig Miller reports on one Silicon Valley company's controversial solar proposal for Panoche Valley.

California has set ambitious goals for a transition to clean, renewable energy: 33 percent by 2020. Some are skeptical that the goal is within reach.QUEST and Climate Watch continue to examine the promise and pitfalls of this historic transformation. Craig Miller reports on one Silicon Valley company's controversial solar proposal for Panoche Valley.