Inconvenient truth: A warmer climate is creating longer, stronger allergy seasons.

WHAT IT MEANS: Climate change threatens human health in a number of ways, but allergies may be the most immediate, easy-to-recognize ailment thus far. And our increasingly chaotic climate's allergy-accelerating properties are already afflicting millions of people. Ragweed is one of the most common weed allergens, affecting about 10 percent of the population. Among allergy sufferers, nearly a third endure hay fever misery brought on by ragweed pollen. Under normal circumstances, a single ragweed plant creates 1 million pollen grains; but a climate change–charged, more CO2-rich environment boosts that number to upwards of 3 to 4 million pollen grains per plant, according to Clifford Bassett, MD, medical director of Allergy and Asthma Care of New York and a member of the public-education committee at the American College of Allergy, Asthma and Immunology. (Don't your eyes water just thinking of it?)

And scientists are also suspect of other potentially climate change–infused weed species. Ziska says there are concerns that other specific plant allergens are worsening due to climate change. His research group is working with Rutgers University in New Jersey and the Environmental Protection Agency to begin assessing pollen production and season length for other annual weeds like lambsquarters, mugwort, and plaintain, in addition to ragweed.

Consuming less, using less energy, eating organic, and demanding that clean energy subsidies replace incentives to fund dirty fossil fuels like coal, oil, and natural gas that make us sick are all important tactics to help stabilize global climate and protect our health. It's also important to realize that we've already set ourselves up for a lifetime of climate-related problems. Here's how to deal with the allergy aspect as we all work to keep things from getting worse.

Here are some solutions to think about now, before ragweed allergies strike later this year:

• Make sure you're actually allergic to ragweed. It may sound silly, but allergists recommend being tested to confirm you're allergic to what you actually think is making you sneeze. If ragweed is really making your life miserable (the longer you're exposed to the allergen, the worse the symptoms become), consider getting allergy shots. The ongoing climate shift could be a cue to reassess your antiallergy options. "It might make people who previously had mild ragweed seasons to consider interventions they hadn't though of before, like getting ragweed allergy shots," says study coauthor Jay Portnoy, MD, chief of allergy, asthma, and immunology at Children's Mercy Hospitals and Clinics in Kansas City, MO.

• Plan vacations accordingly. For many people, February still marks the cold season, months away from hay fever hell. But take your ragweed allergy into consideration as you plan this year's summer or fall getaway. Dr. Bassett notes that pollen counts are generally lower around water. So if you vacation during prime ragweed season—summer and fall, or year-round in places like Florida or Hawaii—plan some time on the beach or around rivers and lakes for some ragweed relief.

• Create better indoor air. Now's the perfect time to grow your own houseplants for free. They should be flourishing by ragweed season. While houseplants can't rid your air of pollens you're allergic to, certain houseplants can counteract indoor air pollution that further aggravates your allergy problem.

If you do start to experience allergy symptoms, try a natural home remedy!