Составьте условные предложения со словами lead to, to prevent conflicts, resolve, listen, respect

1 Building of big plants and factories leads to pollution of the environment. 2 Great politics and heads of the countries try to prevent conflicts. 3 They recommend to resolve problems far beforehand. 4 Sally doesn't like to listen to her parents as she does not use to obey. 5 First of all you should respect your friends if you want to have a real friend.