Photovoltaic solar panels.
<span>CCA stands for chromated copper arsenic. CCA is a wood preservative, which is in use since 1930. copper is the protective structure and arsenic is the insecticide used. Arsenic serves no purpose in protecting the timber, but it is the binding agent of other 2 chemcals.
The best argument in terms of science would be , not to remove CCA- treated wood from the existing building structure. this wood preservative was banned due pressure from common and not scientific reason. The concern was on arsenic exposure. The exposure level of arsenic from the treated wood is far below fatal levels , than it could be seen in diet and drinking water. Hence doesn't harm children. A research also shows that after 45 years of treatment the exposure level is almost nil. Hence it is safe to have a CCA treated woods at home.</span>
Answer:
b. It is a testable statement.
Explanation:
It is because Madagascar has a huge biodiversity that is found only there. The biodiversity of Madagascar shows characteristics that confirm the fact the island has been isolated for about 88 million years. Specific and endemic plants and animals on the island evolved in relative isolation (plants and animals found nowhere else on Earth).
Madagascar is endangered by human activity such as deforestation, habitat destruction and hunting.
