内容摘要：El panorama económico es incierto, en gran parte debido a las políticas económicas de Trump: enormes impuestos sobre las importaciones, purgas de trabajadores federales y la deportación de inmigrantes que trabajan ilegalmente en Estados Unidos.

El panorama económico es incierto, en gran parte debido a las políticas económicas de Trump: enormes impuestos sobre las importaciones, purgas de trabajadores federales y la deportación de inmigrantes que trabajan ilegalmente en Estados Unidos.

, with some 22 million metric tons.“The peaks just seem to keep getting bigger and bigger year after year,” he said.

But scientists don’t know why yet.“It’s the million-dollar question,” he said. “I don’t have a supremely satisfying answer.”Three different types of sargassum exist in the Caribbean and nearby areas, reproducing asexually as they remain afloat thanks to tiny air sacs. They thrive in different ways depending on sunlight, nutrients and water temperature, factors that scientists are currently studying, Barnes said.

Experts also have said that agricultural runoff,and changes in wind, current and rain could have an effect.

While large clumps of algae in the open ocean are what Barnes called a “healthy, happy ecosystem” for creatures ranging from tiny shrimp to endangered sea turtles, sargassum near or on shore can wreak havoc.

It can block sunlight that coral reefs need to survive, and if the algae sinks, it can smother reefs and sea grasses. Once it reaches shore, the creatures living in the algae die or are picked off by birds, Barnes said.Here is a by-the-numbers look at Goodyear airships over time:

Goodyear establishes an Aeronautics Department to build lighter-than-air aircrafts, and by 1912 the company had built its first balloon.In 1930, the “Defender” blimp became the first airship in the world to carry a lit neon sign so the company’s name could be seen after dark.

Goodyear began making airships for the U.S. Navy in 1917, and its first blimp — the first commercial non-rigid airship flown using helium — launched years later, becoming a marketing tool.From 1942 to 1944, the company built more than 150 airships for the Navy to serve in World War II, flying patrol over warships on the seas with zero reported loss of ships when a blimp was on watch.