The aspects of global warming that matter most to people - how rapidly will the seas rise? Are hurricanes already getting stronger? How strong will they get as a result of warming? Those are still immersed in complexity. So in those realms that catch people's attention most, or that get used as symbols by environmental campaigners, those facets really do come with significant back-and-forthing.

The responsibility of the scientist or journalist is to convey the context. If you're talking about the Arctic Sea ice, you have to embrace the reality that there's a huge number of other things that influence that on a year-to-year basis.

You never know you're in a bubble until it pops.

Additional federal studies are under way to see if any contamination reaches taps or ground water used for drinking, but the program under which they are conducted, the toxic substances hydrology program of the geological survey, is slated to be eliminated under budget cuts proposed by the Bush administration, government officials said... estrogens and similar compounds are increasingly the focus of research by the Environmental Protection Agency and many scientists because of hints that they alter sexual characteristics in fish and other aquatic species.

I'm trying mostly to ask questions. And not just trying to stake out a position on something, but also trying to define the stuff we agree on. I'm having battles with comment posters trying to insert a little sense of order so it's not just a long pissing match between the edges, which is what I think a lot of the blogosphere is tending to do.

The survey of more than 100 waterways downstream from treatment plants and animal feedlots in 30 states found minute amounts of dozens of antibiotics, hormones, pain relievers, cough suppressants, disinfectants and other products. It is not known whether they are harmful to plants, animals or people. The findings were released yesterday on the Web site of the United States Geological Survey, which conducted the research, and in an online journal, Environmental Science and Technology.

Scientists are also unnerved by the summer's implications for the future...proof that human activities are propelling a slide toward climate calamity...humans may have tipped the balance...a particularly harsh jolt to polar bears.