Do these sentences have grammatical errors? Like passive voice, punctuation errors, and such. Thanks!
1. Furthermore, possibly the most controversial reason against the death penalty is the risk of wrongful executions upon the innocent.
2. First of all, in the thirty-seven states and federal government that currently have death penalty statutes, there are five different methods of execution: lethal injection, electrocution, lethal gas, firing squad, and hanging (Methods of Execution). By the 10th Century, hanging from gallows was the most frequent execution method (Reggio). By the 1700s, 222 crimes were punishable by death in Britain, including stealing, cutting down a tree, and robbing a rabbit warren (Early Death Penalty). Death penalty has long been a controversial issue of judicial punishments. Nevertheless, as of today, thirty-five out of the fifty states in the United States have permitted the death penalty. On the other hand, more than half of all nations have abolished the death penalty either by law or in practice (The Case). Why is euthanasia, a form of killing unlawful while capital punishment or execution regards as acceptable in a majority of the United States?
3. Execution by elephant was, for thousands of years, a common method of capital punishment in South and Southeast Asia, and particularly in India (Execution by Elephant).