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Three kinds of whale, six varieties of seal, the walrus and the polar bear all have these five things in common: they are marine mammals; they depend on the Arctic for their survival as species; they are vulnerable; and biologists know surprisingly little about them. And since the Arctic is warming twice as fast as the rest of the planet, their future could become even more threatened as climate change increases habitat loss.

This year California has seen the lowest snowpack ever recorded, which was a disaster for the winter ski tourism industry and poses dangers of wildfires this summer and fall. But the dry winter has also exacerbated the state’s ongoing drought crisis. To that end, Gov. Jerry Brown issued an executive order that he said is necessary in order to make California drought resistant.

The governor made the announcement while visiting a California Department of Water Resources snow survey in the Sierra Nevada Mountains at Phillips Station, located in El Dorado County near the Nevada border. “Today we are standing on dry grass where there should be five feet of snow. This historic drought demands unprecedented action,” Gov. Brown said.

The threat of deforestation is understood as one of the major problems in the world today, but a new study suggests that the total amount of vegetation in the world appears to have increased in the past decade, suggesting a rare ray of light in conservation and climate change news.

The study, which was published late last month in the journal Nature Climate Change, saw researchers from Australia assess the amount of carbon stored in living plant mass, also known as biomass, stored above ground. This is one established way that we can measure not just how much carbon is stored but also the density of biomass in any given area and so provides us with an interesting way of assessing regional and global forest densities.

A team of scientists led by the U.S. Geological Survey found that polar bears, increasingly forced on shore due to sea ice loss, may be eating terrestrial foods including berries, birds and eggs, but any nutritional gains are limited to a few individuals and likely cannot compensate for lost opportunities to consume their traditional, lipid-rich prey—ice seals.

Clearing grasslands to make way for biofuels may seem counterproductive, but University of Wisconsin-Madison researchers show in a study today (April 2, 2015) that crops, including the corn and soy commonly used for biofuels, expanded onto 7 million acres of new land in the U.S. over a recent four-year period, replacing millions of acres of grasslands.