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Global warming, deforestation, fires combined could hasten Amazon demise, study finds
Publicado em 14 fevereiro 2024
BOGOTA, Feb 14 (Reuters) - Drought and heat driven by climate change and other factors threaten to cause the collapse of South America's lush Amazon rainforest system, scientists said on Wednesday in a study that found that nearly half of it could be pushed to a tipping point by 2050.
"The region is increasingly exposed to unprecedented stress from warming temperatures, extreme droughts, deforestation and fires, even in central and remote parts of the system," the researchers [...]
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Amazon forest carbon emissions skyrocketed under Bolsonaro, study shows
Publicado em 23 agosto 2023(Reuters) – Brazilian space research center INPE said on Wednesday that carbon emissions in the Amazon forest soared in 2019 and 2020 compared to the previous decade due to poor enforcement of environmental protection policies. The forest’s carbon emissions amounted to 0.44 billion metric tons in 2019 and 0.52 billion metric tons in 2020, compared to an annual average of 0.24 billion metric tons from 2010-2018, according to the INPE study published in Nature magazine. The [...]ver notícia -
Brazilian Researchers Find 'Terrifying' Plastic Rocks on Remote Island
Publicado emTRINDADE ISLAND, Brazil (Reuters) - The geology of Brazil's volcanic Trindade Island has fascinated scientists for years, but the discovery of rocks made from plastic debris in this remote turtle refuge is sparking alarm. Melted plastic has become intertwined with rocks on the island, located 1,140 km (708 miles) from the southeastern state of Espirito Santo, which researchers say is evidence of humans' growing influence over the earth's geological cycles. "This is new [...]ver notícia -
Astronomers astonished by ring around frigid distant world Quaoar
Publicado em 08 fevereiro 2023WASHINGTON, Feb 8 (Reuters) - The small distant world called Quaoar, named after a god of creation in Native American mythology, is producing some surprises for astronomers as it orbits beyond Pluto in the frigid outer reaches of our solar system. Researchers said on Wednesday they have detected a ring encircling Quaoar akin to the one around the planet Saturn. But the one around Quaoar defies the current understanding of where such rings can form - located much further away from [...]ver notícia -
Un estudio documenta el caso de un hombre que dio positivo en COVID-19 durante 232 días
Publicado em 29 janeiro 2022Investigadores del Instituto Pasteur (Francia), la Universidad de Sao Paulo y la Fundación Oswaldo Cruz (Brasil) han documentado el caso de un hombre de 38 años que siguió dando positivo en COVID-19 menos durante 232 días. "De los 38 casos que rastreamos, dos hombres y una mujer fueron atípicos en el sentido de que el virus se detectó continuamente en su organismo durante más de 70 días", explica Marielton dos Passos Cunha, [...]ver notícia -
COVID SCIENCE-Coronavirus can transform pancreas cell function; certain genes may protect an infected person's spouse
Publicado em 29 setembro 2021Sept 29 (Reuters) - The following is a summary of some recent studies on COVID-19. They include research that warrants further study to corroborate the findings and that have yet to be certified by peer review. Coronavirus transforms pancreas cell function When the coronavirus infects cells, it not only impairs their activity but can also change their function, new findings suggest. For example, when insulin-producing beta cells in the pancreas become infected with the virus, they not only [...]ver notícia