Your trip’s environmental footprint starts forming before you ever leave the house. If you pack wisely, there’s a lot you can do to reduce the negative impact that traveling can have on the planet. Here’s a short list of ecofriendly guidelines to get you going. 1. Use Refillable Toiletries Single-use travel-size toiletries make travel convenient, but they are among the most wasteful products on the market. Swap them out for reusable containers that you refill at home—they’re less wasteful, and far more economical anyway. Or, give solid products a try: soap, shampoo, conditioner, toothpaste, and other products are available in bar form. 2. Hitting the Beach? Take Ecofriendly, Reef-Safe Sunscreen Of the sunscreens available in the US, mineral sunscreens are the only reef-safe options. Chemical sunscreens rely on oxybenzone, octinoxate, avobenzone, octisalate, and other ingredients that wash off into the water and harm coral reefs—they can cause coral bleaching, DNA damage, and deformities in developing coral. Stick to mineral sunscreens. Outside of the United States, keep an eye out for bemotrizinol. It’s approved for use …