1)Do Scientists and environmentalists speak strongly against the so-called pet lovers?
2)Who speaks strongly against the so-called pet lovers?
3)Do Scientists and environmentalists speak strongly against the so-called pet lovers or pet haters?
4)Scientists and environmentalists speak strongly against the so-called pet lovers,don't they?
5)Against Whom do Scientists and environmentalists strongly speak?
(Извиняюсь за возможные ошибки и не уверена за пятое)