Aquecimento global
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O mundo já acabou 5 vezes (e você não sabia) | Flavio Pretto | TEDxUFSM
TEDx Talks· 2026-01-23 16:02
O mundo vai acabar. A primeira vez que eu ouvi isso, que o mundo ia acabar, disseram que um tal de Nostradamos, lá em 1999, disseram que o Nostradamos previu que em 1999, num momento exato, o mundo ia terminar. Eu lembro até hoje porque eu tava no colégio, eu era criança ainda e eu tava na aula e a professora parou a aula e foi a primeira vez que ela conseguiu fazer a turma inteira ficar quieta, porque a gente parou, ficou olhando o relógio e acompanhando segundo a segundo até que chegasse a fatídica hora.E ...
Por que devemos proteger os recifes de corais? | Cristiane Costa Sassi | TEDxJoaoPessoaSalon
TEDx Talks· 2025-12-11 16:36
Coral Reef Ecology and Importance - Coral reefs, though occupying less than 1% of the ocean floor, harbor the planet's greatest biodiversity and are vital for income and food for various populations [2] - Coral reefs are crucial for oxygen production, coastal protection, and supporting local economies through tourism and fishing [3] - Coral reefs are marine nurseries, inspiring peace and love, but are in distress and struggling to survive [3][4] Threats to Coral Reefs - Coral bleaching, caused by rising water temperatures due to global warming, leads to the expulsion of zooxanthellae, weakening and potentially killing corals [8][9] - Coral death leads to ecosystem collapse, reduced biodiversity, and decreased fish populations, impacting those dependent on the sea [9] - Unregulated tourism, including anchor damage and people stepping on corals, poses a significant threat to coral reefs [14] Conservation and Solutions - Advocate for responsible tourism that respects biodiversity, including guided tours and avoiding coral contact and fish feeding [16] - Demand management, oversight, and environmental education in reef areas [16] - Conservation of coral reefs is not just an environmental issue but a fight for life, economy, and future sustainability [18] - The speaker emphasizes the need to raise awareness and take action to protect coral reefs, as corals cannot speak for themselves [17][18]