Which of the following is not a concern about solar energy? A)
There are a large number of materials used in solar panel production.
B)
The substances used in production are not environmental friendly.
C)
The substances used in production could accidentially release toxic substances.
D)
The solar collectors are designed to incorporate heat that is used produce steam.

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?