Adding more organically grown food to your diet will help your health and, by the way, reduce global warming.

RODALE NEWS, EMMAUS, PA—With Earth Day earning more attention than ever, it can be hard to sort out crucial environmental strategies from short-lived ecotrends, or to figure out which choices will make the biggest impact on our health. Should we all trade in our plastic water bottles for metal ones? Should we keep buying compact fluorescent lightbulbs? Become ultralocavores and eat only the crumbs underneath the couch cushions? To help sort it all out, we asked each expert on our board of advisors the following question:

What's the most important change that you think everyone should consider making to improve their own health as well as the health of the environment?

Here are their answers.

Protect Our Water. Alexandra Cousteau, explorer, author, and environmental advocate, writes:

Water is our most crucial life support system, yet the planet’s water sources are being polluted, overused, and mismanaged. To help protect this life giving resource and human life itself, I challenge people to act in four areas: source, consumption, impact, and vision.

1. Know the source of your water. Everyone can be an environmentalist when they have a glass of water in their hand.

2. Measure and monitor your personal water consumption. It can be a little shocking when you start monitoring how much goes down the drain. We’ve included simple ways to conserve on the Expedition: Blue Planet website.

3. When it comes to impact, it’s up to each of us to know more about the water footprint of the products we buy and to reward those companies and brands working to reduce their environmental impact. I challenge my generation to step away from the protest signs of the past and speak up from their shopping carts, investment accounts, product reviews, and social profiles. I challenge today’s water advocates to make their product reviews, sustainable seafood discoveries, and local recycling options a part of their Tweets, Facebook pages, and overall social exchange.

4. Finally, I challenge everyone to get personally involved in water conservation by contributing time, talent, and/or resources to a water-related effort that fits your overall personal vision. This could mean taking an alternative vacation and volunteering on a water cleanup or well-water development project, or giving financial support to a worthwhile water-conservation organization.