SEJ's TipSheet lists the top 10 environmental subject areas we see coming up over the horizon — from environmental security, energy, and epigenetics to emerging climate issues, peak water, and more.

The President's Cancer Panel singled out radon, a radioactive gas found in water systems and leaching from soil into houses via foundation cracks, as one of America's "grossly underestimated" environmentally caused cancer risks.

The US Dept. of Agriculture says that 898 of these markets are open during some or all of the winter, even in many northern states. The USDA inventory is searchable by state and city, and considerable detail is provided for each market.

Two recent studies — one examining problems in urban and natural forests, and the other on microbial pests in various settings — reveal the latest knowledge on insect and microscopic invasive species.

The organization MAPLight has pulled together information on who the leading contributors were from Oct. 14, 2008 through Oct. 13, 2010. See which incoming committee chairs received the most money from industries such as oil and gas, agriculture, construction, insurance, electric utility and forest products, and more.

The US Environmental Protection Agency's Compliance and Enforcement information for 2010 is now online with data mapped and searchable by criteria such as state, city, zip code, and type of media affected (air, water, etc.).

The timing of a U.S. Fish and Wildlife Service decision to propose listing of the greater sage-grouse as a threatened or endangered species is coinciding with the presidential election and the rapid expansion of the influential oil and gas industry.

This invasive grass that already has a grip on about 2 million acres in the West makes the rangeland it invades virtually worthless for grazing, harms many animals that contact it or try to eat it, increases wildfire risk, and creates monocultures that have very low biodiversity and crowd out numerous native plant and animal species.

The map and report on known greater sage grouse high-density breeding populations is a starting point that can be refined with the input of state fish and wildlife agencies. But you can use it right away as you cover various land use and environmental issues.

A US Geological Survey report offers a perspective on the global situation and an assessment of known US deposits. There may be about 13 million metric tons available in 14 states — with the sites generally posing the usual environmental challenges associated with mining and refining.