Answer:
(a)
The age for life expectancy during 2015 is 30 years, and the age in 2050 is 45 years.
Hence, the increase in life expectancy is: 50%.
(b)
The age for life expectancy during 1995 is 65 years and the age in 2050 is 45 years.
Hence, the decrease in life expectancy is: 31%. These results show that the life expectancy is decreased.
Answer:
Hormone mimic such as bisphenoal A (BPA) can cause many dangerous risks to the humans. The potential risks are infertility, diminished sex drive, low sperm count, smaller size of penises and others. The main dangerous are to the infants, and fetuses. The risks are very high.
Answer:
Brominated flame retardants (BFR) are used to alter the ignition of the combustible products. These chemicals help to avoid the reactivity of the products with fire. These are mainly used in textile and plastics. The major applications are electronics, furniture and clothing. It is excessively used in tons of polymers to enhance the properties. In North America the use of brominated retardants in very high and products are internationally supplied.
The major harmful effects from the use of BFR are endocrine disruption and neurological problems. It is also found to effect the environment and wild life. Some species which are endangered species like red panda have traces of this chemical in the body. Therefore, the use of these chemicals in products must be limited or banned.
Studies show that the major disruption in the endocrine system in humans is caused by BFR. It is due to fact that the compounds used in the products have similar structure to that of hormones and cause disruption in the endocrine system. In 2001 Hagmat et al find the affect of BFR on the human thyroid system and the BFR introduced in the body of humans from the Baltic Sea fish. The conclusion of the finding led to the restriction on the use of BFR.
European and US (United States) regulators ban the use of BFR. PentaPDBE and octaPDBE are banned from the market because of its dangerous affect on the neurological system. The use of BFR must be limited not because these have affects on humans but these are also affect on the wildlife.
The presence of the chemical is about 70% in the small building apartment. The presence of these compounds make difficult for the human and wildlife. These chemical must be limited or banned on the basis of the danger exposed to the people and wildlife.