34…

O Ozono…
Após ver este vídeo fiquei com um gostinho agridoce! no mínimo… então em que pé estamos?

Depois li isto…
“We found a global slightly positive trend of ozone increase of almost 1% per decade in the total ozone from the last 14 years: a result that was confirmed by comparisons with ground-based measurements,” said Diego G. Loyola R. who worked on the project with colleagues from the German Aerospace Center (DLR).

e pensei “afinal as medidas de combate aos CFC’s sempre deram em algo…”
Para logo a seguir ler isto…
“August 27, 2009-Nitrous oxide has now become the largest ozone-depleting substance emitted through human activities, and is expected to remain the largest throughout the 21st century, NOAA scientists say in a new study.
For the first time, this study has evaluated nitrous oxide emissions from human activities in terms of their potential impact on Earth’s ozone layer. As chlorofluorocarbons (CFCs), which have been phased out by international agreement, ebb in the atmosphere, nitrous oxide will remain a significant ozone-destroyer, the study found. Today, nitrous oxide emissions from human activities are more than twice as high as the next leading ozone-depleting gas.
Nitrous oxide is emitted from natural sources and as a byproduct of agricultural fertilization and other industrial processes. Calculating the effect on the ozone layer now and in the future, NOAA researchers found that emissions of nitrous oxide from human activities erode the ozone layer and will continue to do so for many decades.”
E agora? Ainda outro dia vieram a público noticias que era necessário aumentar a produção agrícola em cerca de 70% até 2050! Um aumento deste tipo só será possível com a utilização massiva de fertilizantes pois a terra não tem capacidade per si de se auto-regenerar à velocidade que necessitamos… mais NOx lançado para a atmosfera, menor quantidade de ozono… bem bem… assim é que não vamos mesmo lá…
Também já escrevi e mantenho: somos seres humanos a mais para este Planeta!