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aalyn [17]
2 years ago
13

Why are biofuels not necessarily the answer to energy problems?

Biology
1 answer:
tiny-mole [99]2 years ago
5 0

1. Vantagens do uso dos biocombustíveis

- Possibilita o fechamento do ciclo do carbono (CO 2 ), contribuindo para uma estabilização da concentração do gás na atmosfera;

- No caso específico do Brasil, há grande área para o cultivo de plantas que podem ser utilizadas para a produção de biocombustíveis ; 

- Geração de emprego e renda no campo (assim evita o inchaço das cidades);

- Menor investimento financeiro em pesquisas (como pesquisas de prospecção de petróleo são muito despendentes);

- O substituto de biodiesel bem o óleo diesel sem necessidade de ajustes sem motor;  

- Redução do lixo no planeta (pode ser usado para produção de biocombustível ); 

- Manuseio e armazenamento de seguros e combustíveis fósseis.

 

2. Desvantagens do uso dos biocombustíveis

- Consome grande quantidade de energia para uma produção;

- Aumento de consumo de água (para irrigação das culturas);

- Redução da biodiversidade;

- Como culturas para produção de biocombustíveis consomem muitos fertilizantes nitrogenados, com liberação de óxidos de nitrogênio, que também são gases estufa;  

- Devastação de áreas florestais (grandes consumidoras de CO 2 ) para plantio das culturas envolvidas na produção dos biocombustíveis ; 

- Possibilidade de redução de produção de alimentos em detrimento do aumento da produção de biocombustíveis , o que pode contribuir para aumentar da fome no mundo eo encarecimento dos alimentos; 

- Contaminação de lençóis freáticos por nitritos e nitratos, participação de fertilizantes. A ingestão dos produtos causadores respiratórios, devido à produção de meta-hemoglobina (hemoglobina oxidada);

- A queima da cana libera grandes quantidades de gases nitrogenados, que retornam ao ambiente na forma de “chuva seca” de fertilizantes, segundo pesquisa do químico ambiental Arnaldo Cardoso e publicada na revista “Unesp Ciência, edição de fevereiro de 2010.  Nos ambientes aquáticos, o efeito é muito rápido: proliferação de algas, com liberação de toxinas e consumo de quase todo oxigênio da água, o que provoca a morte de um grande número de espécies.

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