Fix dead link from MKorostoff#83

index.html

@@ -529,7 +529,7 @@ <h2 class="description">No clean water</h2>
 
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-            <p>Contaminated water is a major source of disease, including cholera, dysentery, and typhoid. <a href="https://www.who.int/news-room/fact-sheets/detail/drinking-water">It is estimated</a> that contaminated water kills about 829,000 people every year, making it one of the world's biggest killers. The cost to provide clean water and waste disposal for everyone on earth would be about <a href="https://www.who.int/water_sanitation_health/watandmacr3.pdf" target="_blank">$240 billion</a>, or 7.5% of the wealth controlled by the 400 richest Americans.</p>
+            <p>Contaminated water is a major source of disease, including cholera, dysentery, and typhoid. <a href="https://www.who.int/news-room/fact-sheets/detail/drinking-water">It is estimated</a> that contaminated water kills about 829,000 people every year, making it one of the world's biggest killers. The cost to provide clean water and waste disposal for everyone on earth would be about <a href="https://web.archive.org/web/20220221195720/https://www.who.int/water_sanitation_health/watandmacr3.pdf" target="_blank">$240 billion</a>, or 7.5% of the wealth controlled by the 400 richest Americans.</p>
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