What did the British government do to try to make sure of something like the great London smog did not happen again in the future?

Explain one example of how the u.s has struggles to balance energy independence and environmental

As the coach of the u.s. olympic cycling team, i can state without question that the swedish and french teams were using illegal steroids. how else could they have beaten us so badly in the last competition? the u.s. team trained much harder and was much more skilled than our opponents. we only lost because a few teams cheated.

Which of the following was probably the most difficult challenge facing construction of the railroad?