It’s very warm for November, and the kids are playing outside. They’re convinced that the greenhouse effect is responsible for the unusual weather, and think it could make a good subject for the next issue of their newspaper.

Maestro speaks about the Earth’s atmosphere, and explains how the greenhouse effect is changing the planet’s ability to regulate its own temperature. The kids want to know what is being done about the problem, and what the outcome might be.

The Gulf Stream plays a big part in maintaining the temperatures we are used to, and Maestro explains that if it is interrupted, parts of the world could become colder as an unexpected result of global warming.

When a message arrives from an Inuit correspondent, a small team sets off to investigate the environmental changes that threaten the delicate balance of life in the frozen north.

Debbie takes the young reporters along on a hunting trip and shows them one of the last remaining areas for wildlife. We hear more about the strain that a changing climate is placing on these remote and traditional communities.

The group makes a plan to spread word of the Inuit's plight, but there's already a tense situation building, as hungry polar bears enter the village in search of food.

Here's a video from the World Wildlife Fund. Traditionally, anaerobic digester systems have not been practical on small dairy farms, but this didn’t stop Sensenig Dairy, a 100-cow farm, from pursuing its goal. Then Sensenig teamed up with the local community to collect enough waste to produce 1,401,600 kilowatt hours of electricity per year from "trash" that would otherwise end up in a landfill.

World Wildlife Fund: Making sustainability a priority, the Marshik Dairy — a fifth-generation family farm — implemented a new, technologically advanced and energy efficient barn design for their 155 cows. The new design included robotic milking facilities, energy efficient lighting and ventilation, and renewable wind and solar power.

Pamela Anderson accepting the Linda McCartney Memorial Award on PetaTv, for her work for animal rights. Help to protect our nature and environment by clicking this link before you subscribe to Yabla.

WWF marine advocate Bob Zuur out at night on penguin patrol as part of the Oiled Wildlife Response team.

Watch some coverage of the People's Climate March that was timed to coincide with the UN Climate Summit in New York City. The march was attended by 400,000 people.

Everyone's heard of California, but this documentary showcases the state's natural beauty and wildlife. It has a fascinating range of geographical features and is home to many unique species of animals.

Kelp is a fascinating plant. What we see on the surface has little in common with what's actually there. Californian harbor seals are mammals but they do a lot of hunting underwater.

Every fall, the monarch butterflies migrate back to their breeding grounds in California. These fascinating and stunningly beautiful creatures weigh only a gram, yet travel extraordinary distances to complete their lifecycle. In the early spring, deep in the Yosemite valley, the sun warms the wet ground, forming clouds of misty fog.

Alive since ancient times, the giant sequoia trees stand colossal and majestic. Deep in the valley, a pair of coyote hunt in the winter snow, while in the Mojave Desert, Joshua trees and cactus plants have adapted to survive the searing heat.