Few things bring as much “bang for the buck” in global public health as vaccines. It is simply a lot cheaper to prevent a disease than to pay for treatment and the cascade of downstream costs (orphaned children, food for people too ill to farm or keep jobs, etc.) Yet in the current economic downturn, funding cuts have forced even high profile programs such as polio eradication and HIV vaccine research to make some fraught decisions about which initiatives to pursue and which to drop.

Which isn’t to say there isn’t a lot of money vaccines. Sales jumped nearly 30% between 2007 to 2009, from $18.5 billion to $26 billion, with flu jabs accounting for $5 billion, and Gardasil, Merck’s controversial vaccine designed to prevent cervical cancer, hauling in just over $1 billion. Per year.

If only there were a rewind button.

From the first, almost cheerfully do-able estimate of 1,000 barrels of oil spewing daily into the Gulf of Mexico to a…

• jaw-dropping 5,000 barrel revision

• horrifying 19,000 barrel update

• are-you-kidding-me? 25,000 barrel recalculation

• and an it’s way-way-way-more-than-the-Exxon-Valdez admission

…the bad news on the BP catastrophe has gone so far off the dial, it has zoomed past “worst case scenario” to “pretty much the worst case ever.”

Dispersants that present environmental issues of their own have only made the situation more complex. “We’re dealing with an aggregation of hundreds of thousands of patches of oil,” according to Admiral Thad W. Allen, the Coast Guard commander in charge of the clean-up. It will takes months to scrub the surface. Years at least to scrub the wetlands.

Five years ago, in a move as practical as it was visionary, the Hôpital Albert Schweitzer (HAS) in Haiti began planting trees – lots of trees – in an effort to mend an ailing landscape.

Small farm plots on hilly terrain had been stripped bare of soil-stabilizing cover (2/3 of the the country is on land that slopes 20% or more). No soil means no food means malnutrition means disease, illness, death.

“Practically every medical problem in Haiti is poverty-related,” notes Dr. Vehnita Suresh, the hospital’s CEO. “The never-ending cycle of deforestation lead(s) to more ecological damage, more compromised farming, more poverty and more hunger. It goes on and on and on.”

Public health and environmental health are so tied together, you simply can’t have the former without the latter. “We can go on giving health-care forever,” says Dr. Suresh, “It would never really touch even the brim of the problem here.”

At TrackerNews, we tell stories by collecting and connecting links. Unlike most aggregators  that are driven by by dateline or popularity, we are interested in context, mixing news stories and research papers, conference videos and book sites, archived articles and blog posts from the field. Typically, between 4 and 6 story groups about health (human / animal / eco), humanitarian work and technology are on the site at any given time, setting the stage for the alchemy of cross-disciplinary insight. Eventually, everything ends up in a searchable database. Day by day, link by link, a broadly defined beat becomes a richer archive, a deeper resource.

Very occasionally, major breaking news stories—a hurricane, disease outbreak, political unrest, climate conference—have taken over the entire site. But the Haitian earthquake stands apart with its mix of staggering devastation, technological hope, massive global response, cascading threats (disease, looting, hurricanes), ecological horror (the fertile skin of  the land has literally been stripped bare from deforestation) and the glimmering potential to right more than three centuries of unspeakable wrongs rooted in the slave trade.

For two weeks, dozens upon dozens of Haiti-related links have coursed through the TrackerNews columns. More have been tweeted via @TrackerNews. Now we have created a special permanent TrackerNews: Haiti resources page. (Ed. Note: the site was taken down after the TrackerNews Project wrapped)