黑白棋利比里亚洁净水的故事》与《最后一口井

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Troubleshooting a Sawyer Filter

Sawyer Training - 用于服装、装备和帐篷的氯菊酯驱虫剂

For use on clothing, tents, sleeping bags, and other outdoor gear, Sawyer Permethrin is more than just an insect repellent — it actually kills ticks, mosquitoes, spiders, chiggers, mites, and more than 55 other kinds of insects.

与费德里科-卡布雷拉一起在阿根廷卡科过滤水

"2015年9月，我第一次骑行穿越 "El Impenetrable"（阿根廷查科），目的是在偏远社区制作、打印和赠送全家福。