4b) visual observations as the sample is brought near the side of the flame, in the flame, and out of the flame, 4c) odor as the fibres burn, 4d) characteristics of the ash including the colour and texture. 4e) The man-made fibers will decompose and melt. much quicker than either the animal or vegetable fibers.
Bluefin tuna swim in a holding pen in Australia. A conservation group has named three fish species that it says are at risk of extinction. The fish are threatened because of overfishing to meet the worldâs growing demand for food.
Sadly, this reach extends to a number of aquatic species that just aren't built to cope with such pressure. In this month's 4 Oceans, we examine several seafood items we just shouldn't eat, even if we have the wherewithal to acquire them. Bluefin tuna. This is probably old news to a lot of readers, but the current state of the world's bluefin tuna populations have been reduced to shadows of their former glory.