Abstract: Pelagic Sargasso seaweed masses floods Caribbean Islands and Gulf of Mexico shores. Eighty percent of those masses are water, and out of the water those masses rot fast. There was not a profitable use for them until now. Sargasso is collected, compressed and dried by the air in thin sheets or mats, locally in a low- tech process. Once the sheets and mats are dried, they are stable and light. They have many uses such as thermal and sound barriers, sound absorbers, shock absorbers, air filters, etc.

Abstract: Pelagic Sargasso nowadays is an inopportune event that invades beaches. This method has many aspects in consideration to successfully grow Sargasso in huge amounts in a designated area. It also discloses many Sargasso Nursery Structures that adapt to different areas and purposes. This method also discloses where and how to set the nurseries in a way that the Sargasso mass can be used or delivered avoiding heavy costs of shipping.

Abstract: Advertising envelopes are anchored light envelopes that display an advertising (32). They are filled with a gas. They are made with a light plastic film or paper. Said advertising envelope and gas together are heavier than the air. When said gas is heated, whether indistinctly during the day by the sun or at night by an electrical source the envelope gets lighter than the air. The fixed envelope raises and displays said message. Other optional elements used to set the advertising envelope on place that not necessarily all embodiments have are: an electricity generator (41), an electricity reservoir (54), a conductive element (51), a resistance (43), a lamp (43), a funnel (23) acting as a valve, a vehicle (27) that drags the envelope (32), a bridle (21), control lines (24), a fan (40), and a photoreceptor (42) connected to an electrical switch (57).