内容摘要：— Extreme mood swings are another sign. Sleep is critical for emotional processing, which is why sleep-deprived teens are more likely to be irritable, anxious or depressed.

— Extreme mood swings are another sign. Sleep is critical for emotional processing, which is why sleep-deprived teens are more likely to be irritable, anxious or depressed.

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Crackling fires have long been a gathering place where idyllic chestnuts are roasted, stories shared and souls warmed, whether around a hearth or at a campsite. Some folks cut their own wood and let it season, but most buy their wood without much thought about where it came from.As it happens, where our firewood comes from matters a lot.recommends getting firewood within 10 (and never more than 50) miles of its destination. Transporting it longer distances — from your home to a campsite or from a farm to your home, for instance — significantly increases the chances of introducing invasive pests into the local ecosystem. And those pests can inflict devastating damage on local forests.

In my suburban New York region, for instance, pests like the Asian long-horned beetle,and the oak wilt fungal disease are major concerns. Moving untreated firewood from my town to yours could make our problem your problem.

To help prevent this,

against moving untreated wood more than 50 miles from where it was cut or across state lines, unless the package bears a state or federal stamp or seal certifying that it’s been heat-treated to kill pests.Australia’s S&P/ASX 200 was nearly unchanged at 8,360.70.

Other regional markets were mostly lower.On Friday, U.S. stocks fell as traders weighed whether Trump’s latest threats were just negotiating tactics.

The S&P 500 lost 0.7% to 5,802.82 to close out itsin the last seven. The Dow Jones Industrial Average dropped 0.6% to 41,603.07, and the Nasdaq composite sank 1% to 18,737.21.